I talk with my sister in Spain twice a month, from California. Sound is usually decent, though sometimes there is a network drop. We can cam too, though my netbook seems underpowered for the latest skype version and that makes the audio choke. I used to make weekly voice calls to our very own lovely LouBelle in South Africa when she had a landline available. I miss our voice chats a lot.
I use Google voice for domestic calls to landlines, as it is free.
I also once saw Farkel rapell down a mountain. Darn fool almost got ate up by a cougar while doing it, but I made a skype call to a friend in the media and the News 8 helicopter scared the cougar away.