I use HearMe over a phone line, in fact over a pretty poor phone line...and I am told the quality of sound is from "okay" to "good" - and reception is usually pretty good. The times I have trouble I have trouble with ANYTHING on the net; though occasionaly I will notice a gap if I am downloading a number of pages while listening. Can't fault the 'puter for that, nor HearMe, since I KNOW my lines are limited.