I like it, but cant use it myself cuz of the phone company. but here is how it works. go to the site and download it. it is a very quick download. after it installs it will give a demo call. then you can sign up and everything. now you will need to set some stuff up with the phone company, but they tell you how. what happens is when someone calls, instead of reaching a busy signal, they get directed to the callwave 1-800 # and they leave a message. when they leave it, the callwave program will ring and play the message. then you decide to go offline and call back, or leave it alone.
I actually prefer using the phone company's Voicemail service. works in the same way except nothing on the computer associates with it. maybe they will do something like that in the future.