GKU 4K Dual Dash Cam

I chose the D900 model of GKU dashcam largely due to the compact size along with high resolution and frame-rate. It happened to include a tiny monitor, pretty much only useful for basic status feedback, but that's OK, because my truck already has 360 large screen video coverage from the factory, but I wanted the dashcam for high quality recordings, along with synchronized GPS mapping and speed data, both for liability/security AND scenic travel logging. Testing, so far, is validating these expectations, but I barely have it going, and will likely update later. Installation is what I expected, but don't expect "EASY" on this or any other dashcam, unless you got something to just slap on the dash or window without regard to discreet installation connection. Neither is it "HARD", though I have yet to hide the cables or the "hardwire" kit (which BTW, they will send without charge if you ask nicely). Wireless connection is as good as can be expected, with some idiosyncrasies inherent in a phone-vehicle tecosystem that I won't bother fulling mapping out. The "Connect" button in the app hands off to the phone wifi - and back - much better than many apps, but may interrupt other things you depend on the phone wifi, like Android Auto. But that's usually gonna be OK, because the dashcam is mostly set-and-forget - until I go on vacation and want to use it for travel-logging, though swapping SD cards will be in order for that. Which brings me to file download speed, which you'd think 5ghz would handle swiftly... but only if your files are low-rez, which defeats the point that I bought this model for hi-rez 60fps. It's a trade off you'll need to handle with multiple large SD cards (maybe not 512, unless you first test for reliability and don't cheap-out on brand). Just don't blame the D900 for any of that, or keep it on low to moderate resolutions. Again, I'm still getting up to speed with it, but I've got no big issues with the functionality, design, or build quality, and am pretty satisfied I bought the right one. Will try to let you know if that changes.