Was just about to post this too. Beat me to it! :) I've been testing it out and it's amazing. Had to donate to the developer because I love it so much. This needs to be wrapped into Sketch. Really powerful tool.
Biggest advantage of using this tool: Dynamic buttons as symbols with text override.
Exactly, it's incredible how simple and powerful it is. Which make me think Sketch might try to incorporate some of it's capabilities.
There's just one thing I don't like: couldn't align by left AND bottom – you have to wrap around additional group, otherwise it's awesome.
One of the best plugin for Sketch! Absolutely must have and should be default Sketch feature.