For $150 I expect a mouse that works for me, make a mouse suitable for right-handed users and another one for lefties, not one mouse that doesn't work for anyone.

Expensive, unreliable on older wifi connectionsOn one hand this mouse is very comfortable to use and the idea of having a wireless gaming mouse is a nice thing to have both for portability and usability

The ability to convert between left-handed and right-handed by removing the buttons on either side is pretty sweet, too

Right hand only

It's so uncomfortable to use those buttons that after 3 hours of game play my hand hurt so bad I couldn't game anymore for 2 days

My hand didn’t need to get used to it; comfortable right away

The 903 however is a bit thinner (because it's designed for both left/right hand use) which forces 2 of my fingers to basically drag on the mouse pad which is a huge no-go (I have fairly small hands for guy as well)

Battery life is great, perfectly fits in my hand as a larger handed person, no latency, nice light weight

The shape of the mouse is Ambidextrous making it hard to get used to if you're coming from right handed mice

It fits my small hand well despite having a claw grip

It's has good weight to it, fits my hand well and like any other gaming mouse you can adjust the sensitivity settings through logitech's software.

also I prefer a right handed mouse.

The G903 lets you configure it left or right handed, but I opted to use all 4 on both sides - it's a bit awkward pressing buttons on the side of the mouse with your ring finger or pinky, but it's helpful to bind something to those keys like the G button or profile swap

It is surprisingly comfortable, although I would say a slight step below a right handed dedicated design like the 502.

Comfortable right handed mouse using the software is easy and you get 31 hours of non light usage out of

Left hand or right hand

I'm left handed but haven't previously tried using a left-handed mouse; this made it pretty easy to give it a go (verdict is still out; feels weird after 20 years of using my right hand, but I'm definitely more precise with the left).For those interested, I upgraded from the G502

While this still of course works, it is designed for a right handed person

This is the best Gaming mouse I have had hands down

If you're right-handed, I would definitely recommend the G703

The shape fits my hand well, but not nearly as well as the G9x, which cups the hand more naturally and places the thumb in optimal position for the side buttons.

This one fits my hand perfectly, no fatigue from everyday use for many hours

This mouse has caused pretty extreme irritant contact dermatitis on my right hand.

I will be sticking with my Asus Spatha as a comfortable hand position is the most important thing for me in a mouse

I looked long & hard for a multi-button ambidextrous Blu-tooth mouse (because I like to mouse left-handed at work, right-handed at home)

Long battery life, great tracking and awesome configuration (up to 4 buttons on side, 2 or left/right handed).

I needed a cord bungie to work well, but that was still an imperfect solution that limited range of motion and could cause feedback when I took my hand off the mouse and the bungie dragged it back slightly

The G703 is cheaper ($99.99) but, unfortunately, it is not ambidextrous---it is designed for right-handed use only

Fits my hand perfect, smooth and accurate.

I'm a LEFTY...so having the ability to make it fit for left-handed use, rather a right-handed mouse softwared for a lefty.

Given I have a ganglion cyst in my right hand that hurts all the time

I also preferred the right handed design of the G700/G700s.

It was too small and my hands got cramped

Because it's not contoured for right-hand use, and has a neutral "flat" design, it lacks the ergonomics of mouses that position the hand at a more natural angle

This mouse has a great hand feel and thank goodness does not hurt my hand

I would recommend buying the Carrying Travel Case Bag by Aproca for this specific mouse as it comes in handy carrying this beast around.

This mouse is as good as or better with the added bonus of working wireless.