Have eaten at the location at MGM, and several times at the SF location near the Moscone Center. Sandwiches are pretty good, at a premium price. At times I found the bread a little dry. Best sandwich I had was the meatloaf with tomato confit. Also was looking forward to the egg and frisee sandwich, but found this one pretty unremarkable. SF location was much nicer, as it was a larger multi-level sit down location, MGM location was small with little seating, likely due to premiums of space at casino locations with a lot of traffic.
Strangely, staff at SF locations proudly trumpeted that they felt the SF location was far superior than the LV location - I found little difference in the food quality between the two. I have heard this statement from other limited location restaurants as well, that have locations outside of LV and in LV as well.