My only true complaint has to be the jigsaw bases, yeah they are demos in the videos that are out there, everyone seems to struggle to disconnect them. While they are demo quality, there isn't a very neat fix for this sort of thing short of resizing the base by a couple millimeters to make the connections looser.
Edit: Well, that and the decision to go for a 6x3 board which seems to be on the larger side of things.
Edited by Westonard