The icons are from https://flaticons.co/
I think RMQ seemed really great, and I do think I could get where I'm going using it (but maybe a little slower). If I recall, working with tableviews is where I switched to Promotion. Tableviews are dead simple for Promotion. I saw your video on the more complex view (the name is escaping me at the moment) but I am generally going to be using the tableview.
At the end of the day, none of the offerings have solid documentation (with examples!). For my needs, Promotion (so far) happened to have the documentation and examples in the places I needed it. I would definitely switch to a framework if it had easier to use docs and examples, but that's just me. I'm not a typical developer (computational physicist and musician turned web/mobile dev).
PS. I'll download the app and take a look. Did you see that the top paid app in the app store right now is a rubymotion app??!