I have been using i3, tmux, vim's conque, ... haven't used neovim's conque yet so I can't comment on it, but here's my experience:<p>* i3 is fantastic for 90% of your tiling window activities: stacking a LOT of windows on the same screen without any problem, its different modes (stacked, windowed, tabbed) are ingenious, it makes it possible to use minimal number of keystrokes to navigate between any arbitrary windows.
The ugly side is that once you've set up your screen with the windows you want, you probably want to keep them like that, while i3 allows you to shift your windows around it gets a bit messy (how do I group these windows together under a different layout?). Also, on Ubuntu, i3 doesn't have the nice "stuff" of other DE, the worst part is that windows don't carry over gnome themes properly and there are bugs with some applications (chrome). Also integrating an "Open another terminal in the current directory" is a headache.<p>* tmux is great for everything terminal related, it's not as good as i3, but it does its job well (splitting, windowing, saving sessions). It has a few interesting features that makes the move to i3 difficult, such as 1) opening another terminal in the same directory 2) scrollback with vim keys (so that you can run a command, do a reverse search on the output, and copy part of it out) and finally 3) sending the same keystroke to multiple terminals (handy when ssh'ing to multiple hosts for testing).
The downsides is that tmux doesn't seem to handle the console all that well (editing in the middle of a bash command kind of breaks on my machine) and it can be annoying to make a script that works with tmux (since it breaks the process parent/child tree, this probably won't affect anyone though)<p>* I have tried vim's conque plugin, but the terminal freezes from time to time. I'm not sure if neovim's plugin is gonna have the same issue.<p>Overall I don't think there's a single piece of software that handles everything completely satisfactory yet. i've been satisfied with tmux for a long time, now making the move to i3 (it's everything I never knew I wanted), despite its several issues I think I'm gonna stick with it for a long time.