I've gone through your limited videos and equally limited user guide, wasting the better part of two days trying to understand your purportedly easy to use interface.  Maybe others are brighter or more technical than I, but this has been a massive waste of time, time I don't have.

Your tool could be great, I'm sure, but without detailed help it's effectively a piece of crap and certainly not worth 500 bucks.  The prototyping software market is crowded and growing, you guys have little chance of gaining market share without real support and documentation.

Good luck, you're going to need it.