Hey. I think you know more, A-LOT more than me about shells and stuff. I use a normal out-of-the-box BASH shell. I don't find any deficiency in 'cd'. None, whatsoever. "Goto" just adds a couple of more features on top of it. That's it. I wanted to replicate Sublime Texts fuzzy-finder, I added a bookmark/shortcut thingy just for the sake of it(..you know more features. ) It helps me traverse between directories and that's that, dude.. Dunno about zsh, fish etc etc. No idea about auto-completes. I made it. Found it useful, wanted people to review it. It was fun, got to learn some more stuff. That's that. Sorry, If you didn't like it.