Interesting feedback here, i've learnt a lot.
I am perhaps coming from a different angle from the rest of you here. I am a Graphic Designer who has only very recently started doing html5. I have no coding background and had never used Flash.
The first program I tried was GWD and, despite it's similarities to PS, I found it awkward and buggy. Text editing is a nightmare and I was not able to transfer or convert banners to other sizes. SO I got Edge Animate. Which I feel is a lot easier and less buggy, so far.
However I can't seem to bring up the timeline of the html files I saved in GWD in Edge. The timeline doesn't load, just a loop of the banner. SO In Edge I am unable to edit all the previous banners I had done in GWD... without once again using the frustratingly limited GWD. Plus some of the text animations have got worse (wiggling unnecessarily) and it is replacing the fonts I used in GWD. Any ideas? Or are the programs just not fully compatible?