Formidable is 1) very well-thought-out to be easy enough to use while providing sufficient breathing space to customise and add deeper coding and 2) its stand-out feature is the quality, care and consideration taken with forum advice. Pretty much every single entry on this forum gives some useful information and is politely given. I have purchased a number of premium plugins and the support varies wildly; this is the best money I've forked out.
This is a great addition to WP for sure. It is an unbelievable program.