Sorry to hear you had such a bad experience. I guess it depends on your luck and/or maybe the individual staff member you're dealing with?
I bought a Mazda Protege from them in 2000 and had it for 8 years, always went to Kramer for service. No problems with either the car or the service department.
However, I bought a "certified-used" Mercedes last year - it's piece of garbage and I've had nothing but problems with Mercedes dealerships in Calgary so far. Won't be rushing back to them for my next vehicle that's for sure.