They only take cash, which is inconvenient. For dogs, a nail clipping is more than double what Tender Touch down the street charges ($12 vs $5). The only problem is that Tender Touch prefers you make an appointment and Claws-n-Paws can usually accommodate a walk-in nail clipping.
Also, everything is open so the dogs can see the owners in the waiting room. It's always cute to see all of the other dogs get their grooming. The open line of sight ends up causing problems for my dog, who get distressed and noisy if he knows his owner is around to "save" him. Most people drop their pets off anyway, so this should not be an issue.