I have a magimix one, and to be honest, its easier to go out and buy a pint of ice cream, what with the making custard, cleaning up and all that crap.
I did go through a phase of making loads of it, but its in the garage now waiting until the mood strikes me. I do have a gorgeous carrot cake in the fridge now that would be delish in homemade vanilla ice-cream. And once I did make gorgeous green tea ice cream.