I have bought machines from them twice. Once about 10 years ago, a TZ for and a shadow ( which I still have) . Pretty good condition machines with only the usual problems.
About 6 months ago I picked up a MSF and a BSD. Since I bought 2, I felt that I had gotten pretty good prices. Regarding this most recent purchase, I would offer the following:
The good: The MSF was in excellent condition ( I would easily rate an over all 9). I have had no problems at all with the MSF. The BSD had a very nice play field ( a 9) and and the cabinet was in good condition. The red lettering on the cabinet and some of the black had been touched up in an average fashion ( Overall I would rate the cabinet a 7.5). They claim a long list of things they refurbish and I have no evidence to prove they did not do every thing they claimed. I had problems with BSD and one of their technicians did help me over the phone trouble shoot the mist multi ball problem listed below.
The Bad: when they say 3 to 5 weeks they mean 6 for delivery. The claim was the refurbish but on MSF not much was needed. Once at my house, BSD did not work properly. Coffin multi ball only put out two balls. Mist multi ball worked when I first got the game but broke the second night. I ended up fixing the problem by rewiring from the head to the play field and all the problems were resolved. ( I wrote posts to Pinside on these issues)
The ugly: When I ordered the pins , I asked how much it would cost to put LED's in the inserts. I was told no extra cost since I was buying two. I asked on three separate occasions, the cost, and was told the price included the insert LED's After waiting 6 weeks,( I admit I started being a nag as they had my money), The night before delivery, I was told I owed extra for an LED package for the entire machines. We settled on that. Lastly, the second time I pulled the BSD glass it shattered into pieces ( another Pinside post). When I bought a new glass at the Allen town show, the guy I bought it from thought that the shattered glass had probably been stressed when cut ( not covered by M and P's warranty).
Both MSF and BSD have been trouble free since, so, overall I am OK with the purchase. Would I buy from them again. Yes, but first, every detail would be in writing. Good Luck, its hard to find perfect machines unless you get them from some one like GAP.