It's a great extension, but I've personally switched mostly over to firefox+pentadactyl and sometimes dwb. If anyone likes the idea of vi-like bindings for browser, I would recommend looking into those as well. There are some cool browsers like vimprobable, jumanji, dwb, luakit, etc. too. I'm looking to be 99% mouse free, so as much as I love vimium, chromium just can't cut it anymore for me.