I HAD a DJI Osmo 4 Action, it was complete garbage.
It was easy to connect to and setup, it was also fairly easy to use. The video quality and anti-shake are top notch, when it worked.
I used it only for taking videos on a bike and it would shut off 9 out of 10 sessions. Sometimes it would shut off before I made it out of the pits, sometimes it would make it 10-15 minutes, and anywhere in between. It was a shock if it recorded an entire session.
I tried a bunch of different mounts and settings and nothing helped. I finally got so frustrated, I took it off the bike and threw it into the ground several times just to make sure it no longer worked. The SD card survived without issue
My next camera will likely be a GoPro.
This is coming from someone who has a DJI drone and I couldn't be more happy with it. That camera was the complete opposite, I wouldn't recommend it to anyone.