Initially I had a problem with these, but once sorted they are a really good headset, with great sound and most importantly, they have a good loud microphone. I've bought headsets in the past and the sound level on the microphones have always let them down, but not this one... nice and loud and clear. The sound from the earphones is good when listening to music or voice, not tremendously bassy, but enough for you to enjoy the music. Bluetooth connected first time without any issues. I really like that you can use just one earpiece or click in the other for stereo playback, perfect for my needs in different situations. One thing to note, initially, I had sound from the earpieces when on a chat program, but as soon as I unmuted the mic on the chat interface, the sound coming from the headset stopped. After a bit of trial and error, I ran the troubleshooter for the speakers and then for the microphone using the windows sound controls and it fixed the problem, so you might need to do the same. All in all, a really comfortable headset with good sound from both the input and the output. Very pleased.