As I said on Twitter, me and @sevfurneaux used it on a project where we needed to be flexible in terms of a CMS and it worked really well, it saved a lot of time as didn't constantly have to create migrations, just add an attribute into a model and done. Didn't need an attribute any more? Just delete it. Also some nice smaller features like attributes as arrays so we didn't need to create a separate model just for a simple thing. I didn't really see any downsides to it, but I know there must be some...
Thanks for your feedback! Team Branch