FormsPlus is superb, there’s no doubting it. Easy to setup, safe, reliable and masses of customisable options. Nothing else really compares. Contact forms, purchase orders, surveys, estimates, warranty registration, booking enquiries - it can do them all!
I published a longer writeup here about FormsPlus on my blog.
If you are on the fence about whether to get it or not, I’d say get it! You’d only have to use it in a single webpage and you would have recouped your costs. It’s that good.
Secret tip: If you hide the submit button in FormPlus and use ‘Static Stacks’ in your steps, you have yourself a brilliant step-by-step tour stack, to use for simple galleries and showcases.