Excellent acting, sizzling script, awe-inspiring direction and a cracking soundtrack make this (IMO) one of the best gangster movies of all time. A great insight into how the Mafia once ruled Vegas. It's frightening, intriguing, overlong, funny, and as violent as a movie can get.
On first watch, I liked it better than Goodfellas. On all wacthes thereafter I think Goodfellas is a much superior film.
I'd give it four out of four.
Mick