The only thing ReWASD has got going for it is building a virtual controller out of two or more controllers.
Other than that, it lacks even the basic options you find in other device remappers, like pressing a key for a set number of milliseconds.
The interface, while pretty, is clunky and has frustrating limitations: you can map a sequence of actions to a button being pressed but not to a button being released for example.
The program is split into sections, solely to make it look cheaper than other options like Xpadder at $9.99, but to get any comparable functionality, you have to buy addons which takes the price to double that of Xpadder (which is of course forgetting that the last version of Xpadder - which is still more capable at mapping keys - is available as a free download).
Disapointed purchase. At double the price I assumed it would be at least as capable as Xpadder. I was wrong.