they aint out yet mate, they are released in march.
as for how good they are, that will depend who you ask. you would be better doing a google search. it doesnt get very good reviews just now, so you will have to make up your own mind. its still early days in the ps3's life, it will be a while before we see the best out of the console.
but when its full potential is realised, i think it will sell very well, and will come out on top of the next gen console wars. the price is putting alot of people off, but i dont care i want one. had mine ordered since last year, so hopefully i will get one on launch date.
so check out google for all the info you will need.