During our stay at SLS Vegas, my wife and I enjoyed the place.
They have some great coffee... but I guess the problem is consistency of the quality of the coffee..
First time we went there, we got latte with hazelnut. It was great... Second time we visited we had a cup of americano... was also nice...
But our last visit, we got latte with hazelnut and latte with chocolate. (with blueberry pie). We were checking out so we took the drinks and had a first sip in the car.
It was terrible... it didn't taste like latte... it felt like americano with syrups..
We couldn't finish the coffee and had to stop at one of the Starbucks to get another latte.
If they get you the right drink... I bet you will enjoy it.. :)