We have a petland right across from us here in BR. While I have to say that the people are wonderful and the amount of items they have for sale is great, the quality of animals range depending on what you want.
Dogs/kittens- excellent. a bit overpriced but from a good breeder
Ferrets/Rabbits/Hamsters/Gerbils/etc- seems to be very good. They are all very healthy and the ferrets have a wonderful temperment and come already descented.
Fish- kind of iffy. the cages don't look very well upkept.
Reptiles/Amphibians- big no-no from here. Not only do they charge 70 per BP, they keep tons in one very tiny cage with only one hide spot and no hot/cold sides. The water bowls are not very clean and they do not help facilitate shed. They look unhealthy. The other reptiles and such seem to endure the same treatment the snakes do.
Birds-wonderful. they handle them on a constant basis and keep them clipped and clean.

hope that helps