I have a Jasper engine and transmission in my 2001 Ford Supercrew. I had to put the engine in at 242,000 miles and I have 300,125 on it today, so 58,125 so far. The trans has probably 125,000 or more. Both have been trouble free in my case.
Jasper's warranty is nation wide also. Kinda nice if you are traveling and have problems with their engine. I would have another installed in a heartbeat.
Curtis