That is why I gave RSFormPro a try.
I was pleasantly surprised by how solid, well-laid-out, and intuitive it was to figure out how to use. There's a bunch of documentation and tutorial videos on the RSJoomla website but I found I could simply follow the sample forms that are provided.
It was so easy and quick to learn that it saved me a bunch of time in comparison with the free extension I usually choose.
I am going to remember that next time I'm hesitating over spending a little money. (And it really wasn't even that expensive.)
The form is attractive on the page, too, and comes with a Captcha element--two more pluses.
Thank you to the developer for making such a nice extension.