I bought TSW 3 Mega Haul pack from Humble Bundle and I already own this route. I created an account just for this.

This route covers the London section of the Great Western Mainline from London Paddington to Reading with 58km of track which is quite short. It was one of the very first routes in TSW.
It also has aged poorly because the route has been electrified all the way to Chippenham (way beyond this route) + branches, IETs replaced HSTs and 387s replaced 165s and 166s.
Though I personally enjoyed this route despite the flaws. It includes commuter services with 166s, express services with HSTs, and freight with 66s. The scenery is fine.