Whats the best casino in Vegas and also the best slots to play?

There is no one “best” casino in Las Vegas. They all have different things and it mostly depends on what your are looking for.

Some people like the high end places and others like the locals casinos or the older places downtown.

Best in what way? Does any of them really pay better than others? Some claim the locals casinos pay better to keep the locals coming back to them. No way of saying for sure since some win, some lose.

The lower domination machines tend to be the tightest. The higher domination machines tend to pay back a bit better to keep the high end player playing.

Your question is a bit to broad to give a good answer.