There is a lot of Starbucks and a lot of mediocre coffee on the strip. Sambalatte is definitely the best coffee option around.
While it feels a little like a contrived "Vegas-style" interpretation of a 3rd-wave coffee shop, they actually have pretty good coffee and also know how to handle espresso drinks much better than anything else around.
The also have a decent number of small tables where you could work/read in peace and quiet from bells and lights of the casinos.
If this place were in SF I wouldn't go out of my way to go here, but in vegas I definitely would.