Looks great, love designer and Forms sounds epically wonderful (wonder if I can export my ios designs to forms for easier porting :-) )

First ten minutes experience: I've got a little weirdness with the differences in generated code from x-code vs new designer (an outlet name went from upper case to lower for instance).

iOS designer is giving prominent error "Custom components are not being rendered because problems were detected".. Though everything seems fine and log doesn't particularly help.