I bought another one thinking it was a fluke - but the space bar stopped working after two weeks

The space bar never "broke in" and was always inconsistent and a

As at least one more user stated, the space bar also requires more force to depress than the other keys

Bought this and in 5 months the space bar began to squeak and was annoying

this keyboard is okay but the space bar is ridiculously LOUD

The only problem is the space bar, which I'm guessing became a known issue

My only complaint (and this is not with EVERY Microsoft 4000 I've purchased, only a few) is that there are times when the space bar is a bit sticky

But the space-bar key is noisy

The space bar stopped working and since it was past one month I could not get a replacement or refund!

The space bar is hard to press unless you press the middle of it.

The big issue I had with it was that the SPACE bar is very hard to press!

I never realized how important the space bar was until this keyboard made it so damned difficult to do - it turns typing into a loud, laborious battle

However, the real problem is the space bar.

I was really hesitant to purchase this as I had seen several reviews that the space bar was defective, but I have not had a single problem with it, no matter where I've hit on the space bar.

the space bar not very sensitive and hard to press.

Space bar is clunky and loud.

The space bar is incredibly hard to press

I wish the space bar was quieter and smoother, which is awkward and getting on my nerves

The only issue is the space bar is SO LOUD

Space bar requires a heavy thumb punch

I agree with others that the space bar is harder to depress and the clicking of it makes it nearly impossible to type without bothering anyone within 50'of you

The space bar is also hard to press down with your thumb due to its curved design.

My space bar now works like it should

But when it's right, the space bar feels like the other keys

Although it is extremely comfortable to use, and I have become very accustomed to its feel, the SPACE bar quit working on my prior two MS Natural Ergonomic Keyboard 4000.

The space bar has been a little finicky a couple of times, but not enough to cause a problem

Space bar or key, is very noisy when clicked.

The space bar requires a ton of force to register and feels sticky... ugh

The other keys are fairly smooth and quiet but the space bar is VERY ANNOYING.

Space bar is so noisy my coworkers are making me return this keyboard.

Space bar is a little noisy but nothing major

The space bar is supported by a stabilizer that keeps the space bar level as it is pushed down from the ends

The only thing I do not like is the space bar is very noisy

The problem is the space bar.

Space bar somewhat difficult to depress, otherwise a great keyboard.

Space bar is a big issue for me

The space bar is especially noisy.

The space bar feels wrong

The space bar has been a problem for me, but after many attempts to fix it following suggestions on the Internet, I believe I found the flaw and a solution

The only negative comment that I have is that I found the space bar to be strangely hard to press and loud

Microsoft should put a split space bar on this just like on the sculpt keyboard.

The space bar is not very smooth, you feel it stuck in the middle every time you press it.

Also the space bar is very loud and hard to press

The keys are pretty stiff initially (especially the space bar -- you really have to hit it to get it to register at first), but loosen up nicely with use

The space bar is also quite stiff and feels misaligned somehow so that it disrupts my rhythm to hit it

The space bar is loud hard to push

After a few months I installed it and much to my surprise the space bar doesn't work

Like others have mentioned, this space bar is crazy loud

Got it home, tried typing...based on a few helpful reviews (that I saw after buying) that mention that the space bar is a problem, I knew within 30 seconds

The space bar in particular is the worst - it sounds like a hammer hitting plastic... over and over and over, all day

the space bar single-handedly nullifies any benefits you would get

I like the keyboard overall, but the space bar is so loud!

My reward for my industriousness with the second new keyboard was a space bar with a mind of its own; working one minutes, making the letters fly 3 to 50 spaces without warning

And the space bar is so very important when typing that it's critical to get right.

It helps with some of my wrist pain but the keys are soooooo loud especially the space bar

The only drawback is the space bar that seems to stick and is much more noisy than the other keys.

First the space bar would sporadically stop working.

The space bar is unnecessarily hard to hit.

and I do find the space bar to have a little more resistance than I was first used to - I only noticed it because I edit videos and use the space bar to play/pause many, many times in an edit.

The only complaint I have is that the space bar is a tad loud when pressed down (more of a preference thing that does not take away from functionality) and the "B" key intermittently does not work

Also, the space bar on my replacement is very loud and clunky

Other than that it's a good keyboard, but I'll be returning mine since the space bar was too hard to press.

But for me the space bar was too difficult to press.

Nice keyboard, space bar is kind of hard to push though..

I sent one back because the space bar was sticky and loud!!!

There is 1 glaring problem - the space bar is "sticky"

Initially, the keys were much quieter, but they have become louder...especially the space bar

The space bar is not comfortable to work with - it kind of sticks, eventually everyone gets used it, but that is not the way it is supposed to work.

hard-Lots of programmable buttons (I use the 1-5 commands to switch between programs, or tabs within the program)-Wired, so you don't have to worry about batteries.-In general very comfortable to use; has soft pads for wrists, keys are curved to match the angle of your hands,What I didn't like:-The space bar

but the space bar is EXTREMELY loud

I bought this keyboard to replace my old one since the space bar quit working

The keys are a little noisier than what I would like, especially the space bar which requires a heavier push

The space bar is very loud

The space bar is HARD to push, sticky, and this hurts my hands.

I feel better actually using my computer(s) and that's a tremendous benefit

The p,[,],\, buttons all failed.

I try to type as quiet as

Everything, and I mean everything, still works as if it were brand new other than the rubbed off keys

The entire j,k,l,;,', panel went dead, as well as the 5,6,7,8,9,0,-,=, (backspace), section

I've used this with both a PC and Mac desktop as well as with HP laptop via a docking station

The c and enter key stopped working after less than a month of use.

Now the "E" and "L" keys are messed up.

The reason I'm not giving this 5 stars is that the letters wear off pretty quickly -- I've already pretty much obliterated the E and

I try to type as quiet as

Everything, and I mean everything, still works as if it were brand new other than the rubbed off keys

The entire j,k,l,;,', panel went dead, as well as the 5,6,7,8,9,0,-,=, (backspace), section

I've used this with both a PC and Mac desktop as well as with HP laptop via a docking station