While it takes a bit of getting used to the exact formats,etc. XMOD has been exactly what the doctor ordered when it comes to building forms for DNN.
We looked at (and even purchased) the competitors and they all had some serious limitations that XMOD just doesn't have.
The best thing about XMOD has been the outstanding support Kelly and his crew have provided. When we got stumped on something they've quickly come to the rescue and have even at times logged into our site to help us through an issue and done a bit of quick code checking/debugging to get us on the right path.
I would highly recommend XMOD!