This is one of the best extensions I have used, spesially on the 'forms' -category!
Does what it promises and a bit more;)
Easy to use, works with every browser and hosting provider (..well I haven't tried them all but..) and even a starter can make things sing with this baby.
Usually it has been difficult to let customers create their own forms from scratch, or even att all, but with RSForms it is possibile.
Good features and flexibility.
Money well spent.