I've been using this plugin for more than 3 years now, on various WP versions. Every time it worked good, few to no bugs at all, no JS problems, no incompatibilities.
I would've give it 5 stars if there would've been a properly explained, step-by-step tutorial on how to add more fields and use the form for bookings and other situations. Or the plugin author could've implemented a few more options to add extra fields.
Not out of the box, but definitely a space saving contact form that's easy to install and it's promptly updated for the latest WP versions.