The extension is great, although the support is out of the box.
It's very easy and clean. If you use K2 extra fields this plugin is what you want. With K2 Story you're able to make different forms in a smooth frontend form. You can set a mail for yourself and the submitter.
I sad it was clean and it is. At first you'll think: "This is all?" Only if you set the options to your wishes, you'll see everything is working perfectly.
Last week I mainly bought it because of the good commented service. And this is totally true. The support is amazing!