This form builder is just perfect. First, it is fully connected to Salesforce so you can read and write on any record of any object of Salesforce. Second the platform is very easy to use, you become an expert in few hours of training and use. Also they though about everything, you can do almost everything you want. Finally, the support service is wonderful, they answer to all your questions very quickly and they always have a solution for you.
Ho, I forgot, it is less expensive than any other form builder connect to Salesforce in the market.