We have used Walkers for both boarding and vet services for our cats and have been extremely happy with everything.
Our fist interaction with them was when we were looking for a location to board the cats while we were away for the wedding. Having driven past Walkers on several occasions, I called and asked about their cat boarding. They were extremely friendly and encouraged us to drop in for a tour before making a decision. In general, when a place does not require you to make an appointment for a tour you know that the are likely a good location since they don't "tidy up" knowing a potential guest is coming.
The staff was extremely friendly and it was very easy to book the time for the cats. We had the option of boarding them together or separate and also had the option of bringing your own food and treats or Walker's supplying them. They do require your animal's records before you can board, so make sure you have those handy if you are trying to book.
We were pleased with their boarding services, so we thought about trying their vet care. Dr. Tucker is amazing with the animals. Our cat Brahma is not exactly fond of going to the vet (what cat is) but she did extremely well with Dr. Tucker. He is gentle with the animals and very reasonable. He also doesn't push vaccines that aren't needed for indoor cats. Check for coupons, too. There is usually one for half off of your first vet's visit.
They also have a small shopping area with food, treats, toys and accessories for both dogs and cats.
I highly recommend Walkers for both their boarding and their vet services.