I drive this route [I'm a train driver] and I say it is 90% accurate, however there are some major flaws with it!
The Up line between Hunts Cross Junction and Hunts Cross station is completely wrong. It has two buffers in the middle so you can't drive over that line, the station end the track rises into the air??? To get from Liverpool to Manchester, you have to take the Up and Down Electric Loop.
Also a freight train is directed through the runaround line at Allerton Depot and crashes with a berthed 158 causing a game crash, this happens when you approach the junction, so you can't drive further. I have taken out the 158 in the editor but it keeps coming back.
Some senarios won't load [i.e. 50% of them]...giving an error code.
I know some people can fix these issues themselves, but I shouldn't have to if I pay so much for these DLC's!
I have seen some youtube videos where they don't have the problem, with the Up line, but surely they should all be the same download?
There are also some signals missing, but on the whole when it works....it's enjoyable. But these major issues above tips my view to the negative. If they ever get sorted out [which I doubt] I may change my opinion.