I took the risk last year and bought the KineMini. The only Digital Cinema camera I had used before then was the BMCC. I'm glad I took the risk though, it is an awesome camera and they are updating it quite often.

It came with a bit of learning curve since the BMCC is pretty much just a 'hit rec' sensor in a box. This one has quite a few advanced features that put it between BMCC & RED cameras (much closer to RED imo, but price point close to BMCC).

Before I bought I was trying to find footage like you, but ended up taking the risk. Though there is now quite a bit of footage on YT or Vimeo when searching 'KineMini'.

The KineMini, using the .KRW format, can record around 45 minutes 4K on a 256GB SSD. So it'll be around the same on the KineMax. Plus you always have the option of using a bigger SSD.

I use a Samsung 850 pro 512gb on my KineMini and it works great. that would give roughly 90 minutes 4k recording. Also, since owning the camera, I've found that Kinefinity are constantly updating and improving the cameras firmware. So they could add more compression ratios in the future for 6k recording.