As far as sales go, Allen Samuels is the best dealer I have ever seen. I got there at 7:30pm test drove a few cars and realized they were closed. I explained my desperate need for a vehicle after an accident and they did everything they could to see if they could work me a deal on an '06 Cobalt. The next morning, to my suprise, they actually called me when they said they would. I was approved (I have no credit) and worked out a low downpayment and VERY low monthly payment deal for me. They were even patient with me when my insurance company screwed up my policy. I would highly reccoment that people who may have trouble getting a loan elsewhere try this place, they work as hard as they can to get you a deal you can afford.
As far as parts and service go the only experience I had with them so far was waiting for them to service my car before I could take it off the lot. This did take longer than my paperwork, I would say around 2-3 hours but they were very busy and I could understand why it might take a while.