I had a difficult time choosing this product as wireless headphones are limited in number, and tend to get wildly varying reviews based upon buyers' expectations.
To set the bar I'm using these to watch TV and play on the XBox after the family has gone to bed, at a distance of 3 to 5 metres from the base station. I'm not trying to stream music through walls or out into the garden, so can't comment on performance in those scenarios.
These are my first wireless headphones and I settled on the Sony ones (but also considered Sennheiser, Panasonic, and Turtle Beach) mainly due to the quality and reliability I've had from Sony in the past.
Out of the box the headphones and base station feel sturdy and are well designed. Setting them up was as easy as plugging the mini-jack into the TV and turning them on. They are very comfortable and I do not notice the base station connection at the top of the band.
Sound quality is very good with no interference or breakdown at all. Playing games with them adds a depth of experience as lots of subtle sounds are now audible. The tip about turning up the source volume before the headphone volume seems to work well here.
I think this is a great product - albeit only tested on modest use - and recommend it highly.