Banerboo does what it says it does so I have given it 5 tacos. But the interface is a little buggy - for e.g. I was working on my first banner, saved it after adding all the elements, setup the animations and then realised the save button has frozen. Whatever I did I was not able to save. Had to restart and lost most of the work I had done. I don't know if that is what normally happens. Haven't worked on it again since buying this about a month back. But it does what I need and I only hope I encountered a random bug. SVG animator sounds good but haven't tried it yet.