I don't have one - but I have seen them on TV as well. A friend of mine has one and unless you plan on using it all the time - she thinks it was a waste of money. She is sorry she didn't buy one like I've got . Mine is a Farberware electric grill with the detachable rotissiere attachment. I love it because I can spin a chicken and also grill at the same time if I want. Plus I can use the grill without using the rotissiere with it. So I do get a lot of use out of it.
It's a matter or preference - and if mine ever stopped working - I would look for another one like it.