As I understand it this is only the beginning of the range, having watched one of the Q&A videos on Utube about the TT120 range they have BIG plans for this new line. This will include many other loco's and rolling stock including other GWR loco's, it's showing great promise based on the initial set I just got. The loco/coaches in that were way better than I was expecting based on their website product images, although I suspect they may have been based on pre-production models. As far as that set goes about the only gripe I would have is that the pullman cars are not lit, however the separately available ones are, I suspect this was a decision made to keep the production costs of the set down a bit to make it more affordable. However I for one would have paid a bit more to have had those lit as well
Happily collecting things all my life...