We stopped in here for a quick last meal during our stay. At 5pm on a Saturday, there were only two others in line in front of me, though we saw that the line can be epic during the morning (ie 11am).
We ordered a roast beef panini, 2 bags of chips, and a large mint tea and it came to $24.35. Super high for normal rates, but appropriate for Vegas. The panini was presented to us uncut and it took me about 5 minutes, while standing right in front of the barista (with only 1-2 patrons in line), to catch her attention and have it cut in half. No other staff offered to assist or acknowledged that I was there.
That being said, the sandwich was very delicious and we enjoyed it greatly. The seating in the area is ample and it's good people watching. As there are no coffee machines in the hotel rooms, this is a good option on off hours. Otherwise there's also a Starbucks and a McDonalds right across the street if you want something faster.