I tried using this a couple years ago - the big issue I had with it is that it's very slow to render text. I'd often accidentally try to print out something that was much longer than I had realised, and then be stuck with Tabby frozen for serveral minutes while it printed everything out.

If you're just using the terminal to run a few commands, and not working in it a lot, it's a pretty tool, and clearly built with a lot of love.