We all have our own experience. I've been into pinball for 5 or 6 years now, currently own 3 pins, and have owned and sold another. I just purchased my first NIB pin back in September which was a Stern Jurassic Park Premium from Classic Game Rooms out of Georgia. In my case, I could not have been happier with both the distributor and the product.
Jason at CGR was very competitive, kept open communication throughout the process (took a few months due to production schedule), and was responsive to all of my inquiries (even though I'm sure I bugged him to death). The pin arrived in perfect condition, but one of the Stern accessories I ordered was missing some parts. Jason handled things very quickly, and I soon received a package from Stern containing everything I needed. I don't question those who have had negative support experiences, as I've not attempted to communicate with Stern directly. However, when working through my distributor their response was quick and to my satisfaction.