I love this REI. They staff this location well so that there's always plenty of people to help you and they are all helpful and knowledgeable. It's not a huge REI, so they won't necessarily have everything (like I went to get a paddle board and lucked out as they had a few in the back, but they said typically the Paradise Valley store is the only one that carries a stock of them). The guy I spoke with with really knowledgeable about paddle boarding and helped me pick a board that would be good for riding with a dog.
They're very dog friendly. People were very nice to my dog and I've gotten a bunch of stuff for her at this REI as the sports equipment for dogs at Petsmarts and Petcos is crap. If you need actual trail shoes (that don't fall apart), winter running jackets, life vests, high visibility vests, etc for your dog, this is the place to go. They carry RuffWear gear, which is higher quality and more functional than most brands. And they have lots of stuff for larger dogs that often the pet stores don't carry.