The performers are not Sinatra impersonators.
First the good. The song selection was good though shorter than the original version. If you are a Sinatra fan (I love early Sinatra) you will enjoy some of his best standards.
The bad. Tacky venue. Both the hotel, casino, and theater are dated and either needs a major remodel or demolish it to make way for a modern facility. The four performers are middle of the road talent. Their voices have no range and would be at home in a karaoke bar. Their banter between songs is dated and tortured, just sing more songs. One singer, I believe to be in his fifties, was called their casanova, this wasn't plausible however, given the fact that the majority of the audience was in their fifties and beyond, perhaps this makes sense. The casanova also played the part of an alcoholic which was totally inappropriate as Sinatra was the consummate performer and NEVER gave the appearance that he was an alcoholic.
Summation: I would never see this show again however, if you want to hear a good selection of Sinatra standards you could do worse.