We have used the kennels at WDW 3 times, and during our last trip, we found an off-site kennel (at a vet's office a short drive away) that was comparably priced, but they would do all of the walking and feeding for you.
We prefer to see and pet our 3 dogs, so we chose the MGM kennel the last 2 trips. They are more reasonably priced (as all of the kennels are 3rd party vendors at this point, I think...they were moving to that in 2004, and the MGM was privatized in 2007 and 2008). One of our pooches got sick during our stay, so we had to treat and board him at a vet (which is how we came to know of that kennel/vet). Dr. Ackerman's number is (407) 847-4472 (for rates and info). It was only like a 5 minute drive from Downtown Disney.
The kennels were clean, and the staff were friendly at the 3 kennels with openings during our trips. (That is another concern: they do book up just like the resorts, so call early for info or a reservation). The kennel chosen determines the services offered. The pets remain confined in the back of a location with limited access doors (they buzz in 2 people per pet max.).
The kennel that we chose required us to feed and walk our dogs, but we preferred that anyway. It is all about what you feel are your vacation needs and what your budget will allow.
Good luck and have a great vacation!!