I am seeking feedback on which Virtual Table Tops people use to play campaigns (if you use them at all, perhaps you may use other tools). I am currently looking at maptools and roll20 but would appreciate others experience in this area. I am trying to start a gaming group but we are spread across the country and gaming face to face isn't an option.

If I had absolutely free choice, I think I'd use Fantasy Grounds, which I have played games in - but it's just too expensive for me at the moment (I'd want to get the type of licence where only the GM needs a licence and the players don't - there are individually cheaper licences, but everybody has to buy a separate one - this may be an option for some groups, of course).