Staff are accommodating but the selection is mediocre and the prices are ridiculous. I agree with an earlier reviewer that it's absurd to charge $XX for a glass of wine you can find in a supermarket. When you tout yourself as having the best wine cellar in Vegas, you need to go a little deeper than Cakebread.
That said, you can find some interesting things in the wine-racks. Interesting, but priced at restaurant prices, less 15%. That's not interesting to me.