The main thing Coda does is to serve files. It does this extremely well. I have tried to put it under stress and to exercise it, and I can't seem to get it to fail.
As far as mobile operation, I think it is quite good; I have had some funny glitches, but I can't say that it isn't due to my inexperience. I'm quite happy with the notion of having ordinary users use Coda on their workstations; I'm less at ease at the thought of thousands of my users trying to run in disconnected mode, though my concern is mainly with the `fiddly' aspects of saving tokens, reintegrating, and repairing conflicts.
Coda is resilient, whether the network fails, the file server goes down, or you do something unexpected. It is, I find, amazingly reliable. If you are looking for high availability, Coda is certainly a serious option.