They sound good as I expected from Sennheiser, but they are not very comfortable and do not really block outside noise, they just make outside noise a little muffled. I've been using 373 PC headsets for a few years and am very happy with them, the sound isn't as good (at all) as the dedicated headphones I have, but I needed a microphone and the 373 PC worked great. I just wanted to repeat this experience and block out outside noise. The 350 PC set isn't as comfortable and doesn't block out much more outside noise than the open-ear 373 PC headset. I switched back and discussed sending them back. I'll probably. Maybe the kid will eventually settle for 350. If you don't care about noise isolation, get the 373 PC instead - they sound better and are more comfortable. If you need soundproofing, keep shopping. I give 3 stars because they aren't bad, actually they aren't bad but other options are better.