They are all very nice. I really only need to capture new things on mobile for the most part, so my needs are minimal. What holds me back, however, is not supporting Google Drive for synchronization, as I use that anyway. As is, I would have to use another service like dropbox to sync mobile edits back.
Wait - I see that org-web says it does sync with Google drive, so I will try that out. Seems like I can use it by self hosting and not requiring giving google credentials out to some scary startupm (or large corporate entity I don't want to trust either).
Organice does support Google Drive, Dropbox and WebDAV. (Organice is a fork of org-web)
More fundamentally, if you (anyone reading) can think of any easily usable way to sync files between devices, I think it might not be too hard to get Organice/etc. to support that as yet another backend.