I never had an Old-Skool UAL course, but I took my 747-400 type in Seattle with the guys who built her, and my 777 course in Miami with the same company.

Much of the ground school on both was delivered by Pelesys, just as it is when you do the UA737 course in IAH. The As were delivered in FBSs by retired line pilots, just as they are on the UA737 course in IAH. The B's were delivered by professional instructors, just as they are on the UA737 course in IAH (or MIA).

The biggest difference was the SKVs, a brand new experience for me, which I found much easier to master than it is to obtain the level of understanding one should have to pass a proper oral exam. And as mentioned, the lack of instructor continuity was a real issue, mostly due to most of my sims being done in MIA, and the PIs doing only a day or two of TDY each.

Bottom line, if you haven't flown a Boeing you will need to pay attention to the Pelesys course. The information you need is in there. But there is no foot stomping, there is no instructor to say "Wake up, this bit is important". So it is harder to assimilate. And far cheaper for the company to produce. So if there are any changes at TK, I'd expect the other courses to look more like the 737 in the future, rather than the 737 to look more like the other fleets.

Nobody that I know of had any problems being successful with the course, or on IOE.