If your job requires you to talk on the phone all day, don't cheap out and buy these, spend a little bit more money and get something useful.

but I was a bit skeptical about a bluetooth device priced this low.

Excellent sound qualityExcellent battery lifeGood volume rangeExcellent bluetooth rangeCons:Status beeps/call notifications through the earpiece are a bit loud and not adjustable

It hurts a bit, may be because I am not much used to it

A bit trickier getting it to pair with the PC's, the primary reason I purchased.

I wouldn't necessarily blame the product, just woul be nice if it was a bit more durable

I have one extremely trivial nit, which is that the volume button rattles a bit if I shake my head

The v5 is a bit looser and has more padding on both sides of the head

Wearing it for a longer period of time (3 hours) does make my ear hurt a bit, but nothing that a quick readjustment won't solve.

I've had to stretch the wire band a bit to make it a bit looser so that it's a bit more comfortable over time