I have purchased two vehicles from Maximum Deals in the past two years.
The first was a 2001 Toyota Celica GTS back in May of 2008. Living two hours from the dealership, it's a bit of a hike for a used car, but the price could not be beat. I called to confirm the vehicle was still there and that it was ready to take for a spin. When I showed up, the car was pulled up front and freshly washed ready for me to drive.
The buying experience was rather brief, but they let me pay it all up front via personal check and I drove it out that day. The whole process of buying it took maybe 30 minutes, but I had to take care of MD Tax, Tags, and Title myself. No big hassle, just a trip to the DMV, and to sweeten the deal they dropped their Dealer Fee. Passed MD inspection with flying colors, and two years and 40k miles later, nothing other than routine maintenance.
The most recent time was in August of 2010 looking for a car for my girlfriend. Still living in the boondocks of MD, Northern VA is the best place for used car deals. She was dead set on a Scion Tc, and after looking at a few clunkers at other dealers (I'm talking about you Alexandria Sheehy...) we saw that Maximum had 8 Tc's in stock. It seems that they specialize in 'sportier' cars, as they carry a lot of manual coupes. We found one that was automatic, and called them to make sure they still had it in stock, then planned another road trip.