As others have said, yes this is a "big box" retailer with the vaulted, exposed ceilings and obviously corporate-mandated color schemes and decorations. But there are also a lot of great, helpful people who work here and you can normally find some pretty neat things.
Seeing as how we just have a dog, I rarely wander to the rest of the store. They offer an assortment of products and run sales each month. Lots of toys to choose from, medicines, and a groomer if that's your thing. They also sell the brand of dog food that won't upset Hans' tummy (a hard one to find sometimes). I appreciate that at the checkout you are given the option to donate to pet adoption funds.
And it's fun to be able to take your pet inside a store with you shopping. It makes me feel rebellious. Dated, yes. National chain, yes. But also convenient, big selection, and decent prices.