has anyone used the Apple Face Time (voip) application to keep in contact with family?

I am moving to NZ ahead of my spouse and kids (hopefully only a few months). The Itouch 4 seems to be a nice gadget to make free video calls at no cost (over wifi). Skype video calls work well but carrying a small phone like device (within you wifi area) seems to provide a good balance between connectivity, cost efficiency and convenience.