I so wanted this to be better given the years of build-up but the current 2.5 star rating is a pretty accurate assessment.
There is a serious lacking of good delis in Las Vegas. I lived in Los Angeles for my last 30+ years, so I am qualified to know what a legit deli is when I tell you that Canter's is not one of them. We walked in tonight and were seated right away. The restaurant was completely dead with just four other people here besides us. I ordered 1/2 a pastrami reuben with matzo ball soup. The soup was practically flavorless and had no chicken in it; I think it was a vegetable broth instead of chicken? Bizarre. Although their menu lists a "soup of the day" our waitress informed us they've never had one. How nice. The sandwich was definitely on the small side compared to what I would expect from a $18 sandwich elsewhere. While the sandwich tasted fine, it was certainly nothing special and would be a sorry excuse for a good deli sandwich in LA or NYC.
The service was definitely lacking and this is kind of shocking since we were basically the only people dining here. Our drinks sat empty for more than half the time we spent there. Before we were done eating, the waitress offers us dessert and when we declined she immediately brings the check and comes back in 60 seconds to see if we'd paid her yet. When she recognized we hadn't, she drops it back on the table at which point we were invisible for the next 30 minutes. Just because you're in a hurry to get us out of there doesn't mean service ends. I don't know how long Canter's has on their lease, but given my experience doesn't seem to be isolated and the place being a ghost town, I can't expect this to last very long.