Very customizable (I like having number row always visible, and having long press for symbols on each letter).
Has gif support built in.
My biggest pain point is:
It auto corrects words that are spelled correctly to other words. I type "our" and it changes to "out", I recently typed "purpose" and it changed it to "purple". Autocorrect is awesome and necessary, but I hate that it corrects words to other words and not just typos. I wish I could find a keyboard that has the things I like without this annoyance.
Gboard is pretty good. I switched off Swiftkey because Gboard has the lil space bar cursor thing. Swipe typing is pretty great, and the predictions are fine.
I would prefer a non-Google keyboard, but I haven't found one that's easy to install and works the way I want it to.
Not exactly 1:1. The main thing that I still miss is multi lingual typing. It's not too big a deal to just switch the languages when I need to, especially since I only use 2. But that's still more than I needed to do with Gboard or Heliboard.