oh oh
I use Skype exclusivly for phone calls from home, and have done so for the past 5 or 6 years. I live in Belgium, but parents live in Ireland, with other family members all over the world. My wife the same. However, we don't use the windows or mac clients.
I have a Skype Dualphone which plugs in directly into the router. Or I use the Skype client for the iPhone or Android (my wifes and my mobile phones), so chat and video calls are irrelevant to me.
No Belgian telecoms operater can come close to matching the prices Skype offer. I pay about 6EUR for a package which consists of free landline calls to most of the EU, and a local number in Ireland. Calls to mobiles in an eastern European country are 24c/min.
I calculated that my savings are in the region of about 50EUR per month.
I really really hope that MS don't force me to change to someone else.