It does work, but with the caveat that the current implementation has a smaller queue list than really required (my words, not theirs). The developers know and are working to resolve in next release apparently. I've been quite vocal with them about this since last summer.

So it does generally work if you are offsite and take 1-2 dozen photos then come back into wifi later. But if you take 50+, then it struggles. You can usually kick it by initiating a bulk upload of the same photo queue and it will move past.