Works great! (PRO Version) – Didn't try the free version.

Needed a quick and simple way to accept payments on my site when people submit questions via a contact form. This plugin works great and is simple to install/setup.

I didn’t want to pay hundreds of dollars per year to upgrade my gravity forms personal license simply to accept Paypal payments, so I decided to replace gravity forms on my site with Contact Form 7 (free!) and install the PRO version of this plugin (wanted the extra features like form send only after successful transaction, and to support the developer for creating this). PRO is only $15 bucks per year for 2 sites so it’s very affordable.

I’m happy with the implementation. It is simple and works. If you are looking for a simple and low cost way to accept payments via a form submission, this is a great route to take.