I did. It seemed to work okay for high FPS videos recorded from a small magnetic-footed tripod stuck to the lockdown bar. It didn’t seem too good for a general playfield cam; picked up a lot of glare and the fisheye effect was still somewhat present even when disabled in the menu. I hoped to use RTMP for streaming and then the full res full FPS version in the recording, but the only way I could get an (unsupported) RTMP stream was in direct mode rather than wifi client mode.
Given that it is not that suitable for live streaming, especially the whole playfield, which is at least half of my use case, I decided to return it. If I do find a need for one in the future, I would get the significantly cheaper Yi 4K rather than the 4K+. I think the main difference is that the + supports 60fps at 4K rather than just 30fps. But I believe both support 240fps at 720p, and I think there might be a hack to get the non-plus to function as a wifi client, so it might have more potential at a lower price.
I’m currently toying around with a Panasonic camcorder instead. I’ve only pointed it at a playfield and looked at the on-camera display, but it looks great on there and I’ll try streaming with it soon.