I've had nothing but a great experience thus far with BreezingForms Trinity and Markus, the Author... who btw provides excellent one on one support. I came up with an idea for a form that is not implemented in any way - as a free customer I might add... and he was right there with me every step of the way. I was so impressed by his willingness to help, that I enrolled in a subscription to BR Trinity, and I'm glad I did. This is so much easier and quicker to use than the free version, plus I'm getting fantastic customer support as an extra added benefit.
Cheers to Markus and Breezing Forms, the first Joomla! extension I've paid for... and I have no regrets.