i use this because i really don't like aerosol cans in my garbage or on my conscience. i love that it's dirt dirt cheap and easy on the planet.
it also works really well but for these things:
1. if you up the starch content and use a hot dry iron, you will find the starch is powdery on the surface. washes out or even just rubs off as you work, but it's there.
2. fabric gets *wet* meaning you really need to be careful with your iron. experience taught me you can really change the shape of a wet piece of fabric with a hot iron. and you will never ever change it back again
3. the starch doesn't really dissolve in the water. not wholly. so if you pickup the spray bottle and just squeeze the trigger, you either pick up a lot of unmixed starch or very very little. i switched to a see through bottle to remind myself to shake it every time.