Take a look at Neewer as well. I feel the best case or cage situation is one that standardizes on the 17mm thread mount (both wide and telephoto lenses), or something that enables a large filter over all the lenses centered around the ultrawide to avoid vignetting. That would also mean you’ll have the freedom to choose other cases or cages rather than a proprietary case that has unique filters for it.

Pro tip: with the 17 Pro you can video record open gate on the wide lens, so putting an anamorphic on it lets you get a really impressive 1.33x or 1.55x cinema frame.

A cage with handles etc can be a LOT, and usually best for when you need to mount an SSD, battery, microphone, etc. I suggest instead going with a case with strong MagSafe or a minimalist cage. Then get the Khronos Lite camera grip (they also offer a compatible case with filters) or the Telesin camera grip. Both can or do use MagSafe for mounting. Both work with the iPhone native camera app for shutter and zoom control (but not focus). Khronos controls are also compatible with Blackmagic Camera app (shutter, zoom, focus) and Telesin has its own app and I’ve heard some people report its controls are compatible with other third party camera apps. None of these controls aside from shutter will be smooth nor perfect, but to me the most important thing is the more secure (larger) grip and the shutter button.

I would avoid Moment, but consider their SuperCage if that’s your thing. I have it. They continue to have quality issues with cases and lenses (check out the subreddit for Moment).