I became a fan of Total Wine last year when I was visiting my family in Arizona... my girlfriend and sister were at a movie (Twilight or something, so of course I opted out) and I had 2 hours to kill. Spent half of it at Total Wine being wowed by the selection and prices. That day I left with a 6-pack of microbrew raspberry beer and a bottle of absinthe.
I was also absolutely stoked that my favorite wine, Tobin James Notorious, was in stock and for sale for like $16. The only place I could find it before was at Marche Bacchus, and it was $21 there. I had been planning to make trips to AZ just to pick up a couple bottles, but now there's a Total Wine in my backyard so I don't have to.
The staff at the Summerlin location are just as helpful and friendly as the ones in Arizona. An employee stopped us and asked us if there was anything we needed help with. We were there to replace a bottle of tequila, and he recommended a cheaper brand that apparently got rave reviews. We stuck with the brand we were replacing (for a friend), but his knowledge and helpfulness show you what kind of a place you're dealing with.
He also told us to sign up on their mailing list to get info on their weekly wine tastings, but I haven't gotten emailed just yet. Guess I'll have to stop by tomorrow and see if they're running them.