This is one of the better Petsmarts that I've been to in the general San Gabriel Valley area. It's about the same size as your average Petsmart, so about half of the store is dedicated to dogs, a third to cats, and the rest to everything else. I only own animals in "the rest" category, so that's what I'll talk about.
Animals: Standard stock of animals - I think Petsmart is more standardized than Petco in this regard of being able to count on the same types of birds, rodents (small animals), fishes, and reptiles being generally available year-round. I won't speak for the bird trade, but I've owned fishes for 9 years, reptiles for 4, and recently inherited two guinea pigs. People who aren't beginners, myself included, generally don't buy from Petsmart as a corporation (not this store in particular). A lot of their animals come from breeders who basically replicate the puppy mill model, but for other animals, and they don't adjust the husbandry within groups of animals. For example, chameleons should NEVER be kept in glass tanks except for Pygmys (which they don't sell) because they'll hyperventilate and get really stressed with low ventilation, but they're in full glass at every Petsmart. Same goes for a lot of rodents - you don't see them selling glass tanks marketed for rodents, so why do they keep them in glass tanks in the store? The fish are probably your safest bet - I believe shipments come in on Thursday or Friday, so I would suggest going around then to minimize time spent in store. They also have 14-day guarantees on their animals, although if you bought an animal there, and it died, do you really want a replacement from the same tank? TLDR: if you're new, Petsmart will probably be more helpful than a mom-and-pop store that caters to people who know what they're doing already, plus they have a lot more "beginner-level" stock. Wouldn't buy here if you know what you're doing though.
Supplies: Good selection, they generally have Perks discounts on different stuff throughout the year, although major sales tend to really favor dogs and cats. You could definitely find a lot of the stuff cheaper on Amazon (especially things like cage decor - wood, underwater castles for your fish, guinea pig hides, etc.), but basics like food aren't that much more expensive. This Petsmart also has the sweetest clearance section I've seen at any Petsmart! I've picked up 30 gallon tanks, light hoods, etc. for 50% or more off.
Service: This Petsmart is actually one of the better ones in terms of their staff actually knowing some stuff about the animals they sell. Not every Petsmart will tell you to cycle a fish tank without fish for the first month to build up microbial communities for example, but I've heard some of the associates here walk people through that instead of just letting them bring home a fish and a new tank on the same day. Reptiles are a niche hobby, so it's harder to find people who know what they're talking about, but animals like Bearded Dragons are so common these days that almost anyone who's kept any reptile has researched them enough to know what they're talking about. Probably the only ones I would be more wary about asking advice for are the snakes and the chameleons.
TLDR: One of the better Petsmart and chain pet stores in the area - would recommend for beginners looking into fish, rodents, or reptiles, not experienced keepers. read more