I've seen some absolutely amazing footage from the Ursa Mini Pros. They seem like a great value but the horror stories about build quality, reliability and service issues have kept me away.
Also many of my clients have probably never heard of the brand so it would be a tough sell on many jobs.
If you're looking for a direct comparison between the Sony FS cameras and the URSA Mini Pro, I've worked with both on a daily basis for multiple years. I first worked with the Sony FS7, and then at another occupation with the UMP.
I can say that, since i'm not a real colorist, the URSA is much easier to work with in post than the FS7. I typically shot in one of the Hyper Gammas on the FS7 because SLOG was too much of a pain to correct and I needed fast turn around for projects. Shooting UMP "film" mode, its very easy to correct with minimal fuss.
The URSA internal codecs are better in my opinion, ProRes just runs better on mac and windows vs the XAVC on the Sony.
The URSA menus are so simple and easy to use, and there's no lag. Unlike the Sony FS7 which lags horribly and I had to purchase Doug's training course just to understand how to work the camera, and even then I still hated the menus.
However, the URSA isn't all strawberries. You are essentially stuck at 800 ISO, going to 1600 (the cameras max) brings in bad noise and blue into the shadows. So the camera cannot shoot in low light situations at all. It's a camera that loves light, and I find that shooting in bright sunlight is it's favorite environment. Even at 800 the shadows are pretty blue.
We have also had a number of build quality issues with our 2 URSAs. The fold out screen has failed, the plastic covers on some of the dials have fallen off, and the record button on the hand grip doesn't work half the time, necessitating pushing it 2 or 3 times to start recording at times. We've sent it back to BM, they fix it, and back it comes, but it shouldn't have failed in the first place.
It's also extremely heavy and only runs on gold mount or v mount batteries, so it's not a portable camera in any way.
I have gripes about both. For narrative and daylight work where sound isn't an issue, I think I'd choose the URSA. For documentary or anything else I'd go with the FS7.
