My wife and daughter have been after me to buy some wireless headphones for quite awhile because I generally stay up later than then and they are tired of hearing the TV at night.  I did some research and checked out all of my options..these seemed to be the best value for the money....Sennheiser well known for wired and wireless headphones....Well, I am QUITE happy with my purchase...it did take me a little bit to figure the tuning...to get it just right, but the sound is clear, the base is great and I can turn the volume on the TV all the way down and still listen...Highly recommend these!UPDATE 2008: I've now had these headphones for three years.  I am still loving them.  The sound is great and it has great range.  I can walk all over my house and still hear fine though when I get to the outer fringes of the range I'll hear bursts of static from time to time. 

Question: What is the sound quality?
Answer: the sound is clear