I really like the six month check-ups. It keeps me honest and because it's a plan I never have to worry about coming up with the money for an appointment. I don't know much about the vaccines but none of my dogs have ever had any adverse effects. I've been a customer for 11 years.
I have had to use specialty vets for ortho and in-home euthanasia but I think that's pretty standard.
I started with them because they were within walking distance and that has been a real convenience.