I use Jetbuilt on all of my quotes even if I make them on other platforms first (I use Service App for field quotes and invoices).
We will be transifitioning to the Enterprise version of Jetbuilt next quarter as we grow.
The only negative is the learning curve, there are so many features that trying to utilize them for quick quotes can be daunting.
My approach to learn that was to go into the Designer settings and minimize everything a client would see and work it from there. My first couple of quotes were like 15 pages with a heading and one or two items per room/system.

There are training videos and the tech support sales staff are great!!