[wanderfowl]

Overleaf's fine, but lack of offline editing, and more crucially, trusting my main working copy to live only on somebody else's computer, is a bit of a non-starter for me.

Plus, call me an idealist, but it feels like a huge step back when a device requires a paid web service to do something that's completely free on a real computer. I don't know that "pay somebody else" should be hailed as the solution to "good software doesn't work on this device".

[gdsimoes]

You made a good point about offline editing but Overleaf's main reason for existing is precisely TeX software not being so good.

[pletnes]

The collaboration and sync tools are very useful, including performant editing by multiple authors at once.

[goerz]

Overleaf has excellent offline support through its git interface (or Dropbox, if you prefer).