[HTC U12+ Accessories] i5lee8bit:
At the time of this post, I'm running original day 1 US model firmware (1.15.617.4), and prices were $14 for Ringke case, $8 for 3-pack TGSP, and $7.50 for the other cheap TPU case I mention a few times).

Case: Ringke Fusion-X

https://smile.amazon.com/dp/B07F2ZNFKZ/

TGSP: Mr. Shield 3-Pack (out of stock. may try another later, but it's definitely good enough for me)

https://smile.amazon.com/gp/product/B07D3LGZ7P/

CASE:

Case is really rugged without adding much bulk. Surprisingly slim even compared to the cheapo clear TPU case I also bought to try (Coohasisee brand). I like the design, leaves a nice view of the back of the phone. Cutouts are super precise and the edges/angles/design are really clean and sharp. The clear part of the case even has protective film on both sides that you peel yourself, making sure it's in perfect condition when you get it.

100% honestly, I think the cheap TPU case's corners have better cushioning, but that's a non-issue for me since I never drop my phones. While the cheaper case seems to actually have some cushioning, the Ringke appears to, but IMHO the case seems too solid to actually cushion from drops on the corners.

Funnily enough, using a case actually seems to make using the digital volume/power buttons more reliable. Without a case (or with the official HTC free case that comes with the phone), I would often mistakenly hit the power button without actually touching it. If my thumb/finger was just below the power button while I was handling the phone, it could accidentally trigger a power button press. Doesn't happen whenever I have a case on though. Edge sense also works great. Strangely, without a case, edge sense would go nuts - sometimes the lightest squeeze would start triggering edge sense while death grips wouldn't be enough. I dunno, I think maybe it was registering part of my hand (palm or fingertips) touching the edges of the screen while squeezing? Honestly it makes no sense to me. With the case though, it's as reliable as my U11 (I have it set to short squeeze camera, long squeeze flashlight). Double tapping is just... different. I have to tap differently. But truthfully, I really don't use double tap actions at all (yet).

TGSP:

Good enough for me. No bubbles, and edges stick down perfectly. Not lifting up at all like with my U11. Has good oleophobic coating. Only problem is I think it's like a fraction of a millimeter too narrow. I have the right side stuck PERFECTLY in line, and a very tiny bit of the left side isn't covered (all in terms of viewable area). I'm talking the width of maybe 3-4 hairs. Shame, because if the right side is stuck this perfectly, they could afford making it a bit wider and still not worry about the edges lifting. It's good enough for me though that I don't think I'm even going to try another unless it gets scratched or chipped. I installed it with absolutely no dust and lined up perfectly, so I don't feel like doing it again. Plus, I have 2 more since it was a 3-pack lol.

PICTURES!! Pics are very high resolution. Last 4 pics show the TGSP.

https://imgur.com/a/23wpLKe

- Note, this isn't my permanent phone yet. Still using my U11 until TWRP and a nice ROM gets released. I still need to run Zelda A Link To The Past on an emulator and splice a new wallpaper with the new 1440x2880 resolution. My home screen normally looks much sweeter than the default Nova layout. =)

Attached some pics to the thread, but all pics I took are in the IMGUR link above.