I've spent a couple of hours playing with C3, I quite like the interface a lot especially on my UHD display, lovely stuff.
One thing I'm finding really irritating though is the saving system. I connected Google Drive to C3 and expected to save via that, however - it takes FOREVER for Drive to load its information to allow me to save. So I go to press save and have to wait 3 mins before I can save it, every time.
So I've instead been downloading a copy of it and that is fine except I'd like to get a save as dialog so I can choose save location and I hate how it adds a (n) on the end of the filename. One lunchtime session an I had test(20).