I've taken the plunge with Skype and so far I have to say I'm very impressed.
I've already made 2 free calls to the UK (Skype to Skype).
I've also used the instant messaging service which to my eyes and brain works as easily and effectively as Messenger.
The user interface is very easy to get a handle on and apart from the ridiculous cost of calling a mobile to check everything is working correctly, I couldn't be happier
Now I just need to find other Skype users to add to my contacts list.