I purchased a DIY-Cinestar-copy brushless gimbal like two years ago with 8-bit SimpleBGC. The most difficult part is achieving a good stabilization when you are so noob because these systems require pretty much knowledge, but with will, time, patience and some things more, you can get a decent stabilization with any gimbal if it's well constructed and if it suits your camera weight and size and your needs.

I had to rebuild some parts designed by myself using the Internet and my own ideas, and when the balance is perfect, everything is allright on the gimbal and you know how to tune it properly (if you don't have Autotune, like me), the stability gets vastly improved.

I want to buy a MoVI or something really good and well known to use bigger cameras, but no gimbal is perfect (yet) and they all require the same knowledge, more or less. AND Freefly is expensive, dude. But maybe someday.