I've had these for about a week now, been using them daily for online uni classes and gaming and they've been fantastic. The setup was super easy (literally plug the USB in and press the power button and it works) and the connection is great, the sound quality is better than my previous wired headsets and I love having the ability to walk around my house wearing them! I can even move from my computer downstairs to my bedroom without any issues! The sizing seems quite good, My boyfriend who has a big head tried them on and we were worried they wouldn't fit me since my head is quite small comparatively, but they fit fine! I''ve got a few logitech products, a keyboard and mouse ive had for about 4 years and both are in pristine condition, although the construction of this headset seems to be of a more lightweight material I think this will last the test of time like the other logitech products I have, and I think if the headset was much heavier it would be uncomfortable.
All in all, I love this headset and I'd suggest it to anyone in the market for a new headset, my previous headsets have been from Hyper-X and Razer and this headset blows both those brands out of the water.