Shuttle is super nice! So detailed and accurate, and real-sized too.
But orange booster-launcher is very messy and needs fixing.
Engines below are totally botched, it is neither realistic neither practical, since with such configuration it can fly only with No Heat cheat activated. It would be much better if launcher could fly without any cheats.
Also connection method between launcher and Shuttle is botched - this frame-separator will leave its part-side on shuttles shielding plate and that this part will overheat and explode later.
Top side of launcher has very bad aerodynamics, there must be a good reason for that, but here there are no such reasons.