I absolutelly love this little head set.  This is my second one as unfortunately I found out they do not survive the washing machine very well.  It fits around the ear very well and does not intrude inside the ear canal as some do.  Sound quality is at least as good if not better than the speaker on my cell phone.  I have been told that sound quality of the mic is equally good by those talking to me.  I really love the folding mic and the smooth body when carrying it in my pocket.  This set is so comfortable that I usually prefer to wear this instead of use my phone to talk, even for a short time.  I like it well enough that when my local phone store stopped carrying it, I went online and searched until I found one I could special order!