As others have noted the limitations placed by the Webapi and the tabopen/open bug that occasionally opens three or more tabs are annoying (the developers themselves are aware of this), but overall this extension has greatly increased my productivity, and navigating links with the keyboard is much easier than using my laptop's crappy trackpad.

I've tried Vim Vixen, Vimium and this, they all have their own set of strengths and weaknesses, but so far Tridactyl is my favorite

Update 24/08/2019: the aforementioned bugs were fixed, tridactyl performs flawlessly.