NuWu is my go to spot in Vegas.
The customer service has always been over the top. Questions about the chemical makeup and which strains help specific symptoms or pain can be answered here by many of the budtenders. If one budtenders isn't able to confidently answer a question they will call on a peer for advice which is something I enjoy seeing, especially in a work environment
Occasionally the herb I have gotten can be dried out which can be frustrating, but much of that falls on the grower, not the dispensary.
One other frustrating thing can be sometimes they will no longer carry popular strains, while other dispensaries have it in stock. (However I'm not sure what the supply vs demand is for different growers and how much can legitimately be distributed to the different dispensaries for sale.)
They have a rewards system, vast amount of merchandise, and the best part is the price you see displayed is what you pay.
Sometimes the music can be a little loud, that'd be one of the only downfalls I'd say.