My experience with Sprouts is pretty limited, seeing as how this is the first (and only) Sprouts location that I've had the opportunity to visit - and, at the moment, I'm relatively easily impressed since I'm currently living in North Dakota and the selection and options up here are pretty dismal.
That said... I was ridiculously impressed with Sprouts. Up here in North Dakota, you can't get liquor, wine, or beer in the grocery stores (*le gasp!*), so the thought of being able to pick up all the ingredients for a meal AND pick out a nice bottle of wine (or beer) to go with it is astounding. The selection is fantastic (you Arizonans don't know how good you have it!)
I can't say much about the employees, since we didn't really need to get any help finding anything. I was in town on vacation, visiting my parents, and the only reason we'd even stopped in there is because my mom was looking to find some fenugreek for a recipe she was wanting to try out. We found it in the bulk section - even though she forgot to grab the code so the cashier could ring it up. For me, the cashier was the best part... A smiling, dark haired beauty with ruby red lips. I think she was surprised when I offered to run and get the code off of the fenugreek; I don't think she realized that I was with my parents.
All in all, I'd quite happily visit Sprouts again - even if just to catch another glimpse of that pretty cashier. ;) Seriously, though... Coming from a current North Dakotan who has limited options, Sprouts is fantastic. I can honestly say that, when I finally get down to Arizona, Sprouts will be the grocery store I stop at first!