This looks great for newcomers and still good for the rest of us too.
I consider myself a fairly advanced creator, but I still learned a few things, mainly about a few features I'd written off early on and failed to reevaluate later, once I knew enough to better understand their usefulness.
In particular I'd never really noticed the movement modes, for grid snapping. I'm still not sure they're a good fit for my desired use case of better UIButton layout, but it's still an interesting feature I'd missed.