The higher end gimbals aren't more stable or anything vs. a properly tuned cheapo. They just weigh a LOT less, use a LOT less power and in cases where the cheap gimbal comes with ESC's that are noisy, the inexpensive models will be whisper quiet. At least that's what I found with mine although my cheapo gimbal is nearly perfectly silent.
My board did end up frying over the weekend when I was at a big subaru meet, there were so many people around asking me what I was doing and what stuff did and how far it flew that I think I ended up damaging the board when trying to get the marshmallow mounts through their holes. I was disappointed but ended up getting better shots without it because we were just grabbing clips for a video about the whole thing with in-car shots and handheld footage mixed in. The lighter copter w/ longer flight times allowed me to keep it in the air longer and get more unplanned moments that I would have with a gimbal because I'd be worried about the flight time and having something go wrong.
I will NOT spend $300 bucks for a gimbal as I will only occasionally fly with it anyway even if it didn't affect the handling and flight times at all. I found that I actually prefer flying without a gimbal when in new places for the reasons listed above. Even if the flight time wasn't affected nor the handling, I'm still worried about using it in new places because it's still 100 bucks and it's still added complexity.
I fail to understand the argument some people make when it comes to hobby quads that you want to buy the best equipment you can afford to 'avoid issues'. I say unless you're a professional cinematographer or just have a lot of money to spend, get stuff that works but is affordable and can be replaced for cheap because you will crash it at some point. They might say a more expensive gimbal might be more survivable in a crash but I can simply take the $300 bucks I would spend on a more expensive gimbal and buy 10 extra batteries AND another gimbal and be able to fly 5x more overall than the other guy.
I recommend getting the cheapest BCG 2.0 gimbal you can find on eBay and spend a couple more bucks for some dean's plugs and good shrinkwrap.
Just my opinion.