I bought all four of the available GP50 repaints in the current sale. They do seem to come with a loco but that's hard for me to prove since I already had the DTM GP50 and SD50 sold via Dovetail.
First one I drove was the Burlington Northern. Ran a nice shunting scenaria they included but about a mile from the end I was sitting face to face with another train. After a couple minutes I coupled up with it and started pushing him backwards so I could finish but after about a minute of that the game declared a derailment. I thought I had read somewhere that that had been fixed but it must have been something else. Nice loco otherwise.
The Burlington Northern Tiger nose is a nice version as well. Also includes the orange/white striped nose version.
The ATSF “Freightbonnet” scheme is nice but the loco horn has issues. The horn is delayed from when you hit the spacebar and it only has a long blast. Nothing short so forget about proper road crossing warnings. And there are a lot of crossings on the Cajon Pass route.
The last one was the BNSF (with logos). A nice loco and paint job here.
Good dynamics in all of these. Fast acceleration with little or no load and you definitely know it when pulling a load. Braking is an issue under load but dynamic braking properly used made all the difference.
Would be nice if they fixed the standoff situation at the end of the scenario in the BN package because I don't see any other way to complete it and the horn in the ATSF package. If I can figure out how to swap if with another I will. The scenarios are well done (with the one exception found so far) with lots of traffic to deal with and are a real bonus in the packages.

And no, you don't get Steam keys with these but when I read about these before purchasing I found that that has been discussed at endless length in the past.