I have had this headset for around 18 months, and they perform nicely and the wirless i have had no issues with at all, however the battery died on the first headset and the connector when they plug in to charge has become loose on both pairs ive owned.
That said Logitech have the best warranty there is , only rivalled by corsair and both times ive had issues they have speedily sorted me out , giving me a new set the first time second time they are dealing with now.
So in short they work great are very comfy and the wireless is really well done with no issues for me at all, but maybe they arent the strudiest but this is countered with excellent support from logitech.
A good buy at 129 i think if you are after wireless gaming headphones.