Kramer has just written what I was about to write.
Went last year on a free ticket, for a tenner and an hour on the train to get there. Finished looking around the show in about 3h. Single hall with not all that much to see. Deviate stand with the ti-lander and the lowlander was good, along with some of the custom painted frames.
I feel like it doesn’t quite know what it wants to be, there’s not much to actually buy there, but there’s also not all that much to watch/listen to. You end up walking round looking at shiny things and forgetting about them quickly. Or I did anyway.
I didn’t feel cheated at a <£20 day out, but still struggle to remember anything groundbreaking. Definitely wouldn’t recommend it if you needed to buy entry + travel 3h to attend.