Just took the ATP multi written at Peter Prince Airport in Milton. Don't rely on the free testing centers at military bases. I made an appointment for the ATC-Mobile site months in advance only to have it postponed twice until I was up against a hard deadline this month, and I couldn't get time off during the day. On my last available day before having to deploy, I called around the area (BFM, PNS) at 1700 asking if anyone could stay late to proctor the exam. Paxton, the chief pilot at Peter Prince, called me back and came in from about 2000-2230 to proctor it for me. Solid guy; really did me a favor. As for the Sheppard Air gouge, I felt like it was good, but I was surprised that the test had many more chart-reading and flight planning problems than the practice test. I studied most of the 3 day weekend and then some more. Let's just say I passed, but I'm getting my money back from that 90% guarantee. I took a practice test on the Sheppard software the night before and scored 15% higher on that than I did on the real test. And I had 10 validation questions, not 2. I was sure I failed, but I scraped by.