I have just recently purchased this route (4/24/15), and I must say that ALREADY this is one of my favorite routes, and let me tell you why!
The route itself is a perfect length, not to long, not to short! The speeds on the line vary anywhere from 10 MPH (the town of Brownsville) to 40 MPH. The slow(ish) speeds in certain places really give you the chance to look around and admire the scenery that RSC apparently took their time with. The scenery looks very full, with lots of trees and small details. The route does require a fairly decent system, due to the detail, but I tweaked my graphics a little and managed to get it to around 25 FPS average. The one thing I can complain about the actual track is that while there IS elevated corners for once, the degree of elevation seems MUCH to steep for the speeds that the route allows.
This was where the route took a downturn. The locomotives included are the Norfolk Southern C44-9W (most of you probably have this already from the orig RSC D9 pack), and a Norfolk Southern ES44DC (basically a reskin of the NS Heritage GEVO). The Dash 9 has, of course, the default ES44 sounds that we have all come to know and hate. The ES44 has the same soundset as the Heritage ES44's, which is not great, but far more realistic than the origional ES44 sounds. The worst feature of the rolling stock is that the route comes with only 1 TYPE of car, and that is a coal hopper. I know that there is alot of coal on this line, but there is definitly MORE than just coal in real life.
The scenarios were okay, to start. There are 5 career scenarios, no standard scenarios, and no free roam scenarios. The 5 scenarios that are included utilize JUST the ES44, and there are no scenarios using the Dash 9. The scenarios themselves were alright, though they seem to be very similar to each other, and were very rushed. For example, I was going the speed limit on one scenario, and I ended up being 45 seconds late and getting 36 points chopped off my score :P. Good thing there are quite a few workshop scenarios for this route.
Overall, I do like this route, but I do wish that it came with a little more variety. If you are more into the scenery than the rolling stock, then this is a must have! I give this route a total score of 8/10.