Interesting idea.
I had actually thought about putting together a similar service for clients. Especially like the "guess for me" options.<p>Some feedback:<p>- You offer a trial, but that wasn't clear to me looking at your marketing/home page.<p>- It's nice to be able to see if not a full demo, at least screenshots of the product without having to register. This combined with the first point could deter some potential customers.<p>- Your payment form is very sparse. That's nice, but personally I want to know why I should trust you with my payment info. If you're using a third party processor such as stripe you might indicate that.