I know this post is a bit old, but I used him for my '96 Fleetwood. His "power tune" worked great, but introduced some odd cooling fan behavior. He tried to correct it a couple of times. I finally got my own JET tuner and took a peek myself. With the help of a different PCM tuner, I found the problem. That guy didn't want to throw Solomon under the bus so he gave me hints but wouldn't tell me exactly what the problem was. He did say, however, that the problem has been floating around for a long time among tuners who copy files from each other rather than designing their own tunes. I found the issue in the turn-on and turn-off settings for both fans. They overlapped so the fans ran continuously. I think there was something different about the sedan programming versus the F-bodies.
All told, I would use him again. He was very responsive and apologetic about it and was very determined to make sure I was happy.
If you do get your PCM tuned and the cooling fans run continuously, I can tell you exactly how to fix it ;-)