Interesting Larry...I feel I had better service when they were still Beck's. Once Park Place bought them out, the labor rates immediately went up, the reps were less personable, and service on my older 300E has been spotty...I guess it depends on the quality of the techs on the current turnover cycle.
I seem to have felt let down when early problems cropped up on the used 95 500SL I bought from them. They were proud and eager to tout the "Starmark" warranty, but when I took the car back for seat problems and a rear convertible top window that literally "split" in two, (this, on a car with 30K miles), the benefits of the warranty seemed to vanish. Never got the seat fixed (for fear of the total bill) and after intervention with an MBUSA rep, ended up paying for $340 of the total repair for the window.
I've started fixing the 300E myself (thanks in part to the forum), and because I get one thing repaired, only to have the car returned to me with one or more new problems.
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car