This place teeters on 5 stars and 4 stars for me. There's a lot I like about Commonwealth, but I think long term it may be doomed.
The first time I went here was awesome. Good crowd, nice bartenders, and decent music. I went back a second time and the bartenders were completely different and just not as friendly as the first batch. I've probably been back 2 or 3 more times, and it seems like it's a different bar staff every time. I like to get to know my bartenders, so this is not the best thing. But they're all pretty friendly.
I think the place could be a bit smaller. It's just too big for the scene we have in Vegas. Griffin can be too small at times, but this place often feels empty with the large downstairs PLUS upstairs. Not sure if it's sustainable.