I used this form creation tool to create a very complicated set of forms on the site:
https://trentonpethospital.com
The forms had to distinguish if a client had a dog or cat and several age groups for the pet (3 for each) as well as whether the pet was male or female.
Even though I had the FREE version of Tripetto, I reached out to support for some questions and some issues I had, and they were VERY helpful! I was very impressed.
I really like the single line type of text input that Tripetto creates. It's a nice user experience and I think might result in a higher percentage of forms being completed.
Please note: The forms I created for TPH are for clients to figure out a health care plan. There are some other forms on this site that were not created with Tripetto.