Pros: Excellent sound, decent range
Cons: Expect about 4.5 years max on these headphones
Value: Few electronics I have ever owned got as much use as my Sennheiser headphones. I use them primarily for television viewing to get a clear sound while taking care of chores, or watching TV at night when the children are asleep. In both cases they are indespensable.
Quality: I owned the previous generation of their headphones as well. In each genearation the quality started out high, with very good range of reception. As an exampe, I could work in my crawlspace and still get a good signal. This lasts for about 3 years. After that the sound quality gets much more white noise and drop outs, and the range restricts significantly.
Excpectations: I have tried to replace the batteries, and use other mechanisms to extend the life of my headphones, but at some point they just don't charge anymore. expect a shelf life of 4 and a half years max.