I got one of the new latest greatest ones for Christmas I'm trying to sell on craigslist if anyone is interested. I already have a griddle for the stovetop, that I hardly use.
the ONLY thing i use a foreman for is quesadillas. it crisps up the tortillas quite well. i never have been able/wanted to cook anything worth a damn on it tho, dont wanna risk a good piece of meat.
If you're doing chicken breasts just make sure you put them under coid water to defrost (if frozen). In college I used to Foreman all the time and it cooks up breasts really well if you season evenly.
I use the big foreman indoor/outdoor electric grill with the dome cover all the time. It's awesome, which is why central market uses them for all of their demos.