So I spent money on a developer's license to get a big, big surprise.
(1) You get a one year rental. No, you can't use the software like you thought. You may not have seen where they have policies. When you find it, you will see that after 1 year your license to use the software expires. You think they would tell you this up front before you buy and make sure you know it.
(2) If you don't pay up really quickly, as in within 8 weeks of expiration, they will charge you full price to get a renewal. They are so scared you won't renew that this is another crazy policy.
(3) It's pretty good at taking in data sometimes but it has glitches and it is extremely mediocre for output.
So unless you want to be a slave and pay them big money every year, you're better off not integrating this form package and looking elsewhere. Bad policies, bad business. I bought another really hot looking form product, doesn't purely integrate into WordPress the same way but is so much more powerful and can be used in WP just like anything else.