Solid construction and a fully-featured PCB!
I've developed an interest in ortho after building an Ortho60 and using it for about a month, before switching to split ergo. After spending some time getting a keymap for 40% keyboards ironed out, I decided to pick one up as an experiment with a full metal case. This is a great price for an aluminum case and PCB, and the build quality on the metal parts is amazing. This was also easy to assemble, just follow the booklet and use the provided tools, no soldering required for MX switches. I went for extra secure with the Gazzew Silent Tactile switches I installed in it, and slapped some shelf liner into the case to further reduce any ping and add a touch more weight. The USB-C port comes out the bottom of the case to make the overall board as low as possible with the MX switches, though I'd still recommend some kind of wrist support with this.
I'd recommend you spend some time going over the keymap to make it the way you like. I really like ESDF for arrow keys and mouse keys on other layers, which clashes very harshly with the HJKL-focused default keymap. Luckily this board is one of the driving forces behind QMK, and it supports all of the cool features like the famous built-in speaker and music modes, rotary encoders, and options for up to 2 2u spacebars in the middle. Spend some time deciding how you want the keys positioned, and you can set them up any way you can imagine, and some you can't.
There's a few caveats to this board, like most others. Switching to 40% is very demanding, and requires a lot of fiddling with the keymap and relearning where all the keys have moved to. The USB-C port is SMD soldered, so it's possible to be ripped off if you're not careful - you can very carefully apply resin to the port to reinforce it, or use magnetic connector cables if you're worried about it.
And of course, there's the non-split ortho layout which can cause RSI if you're not careful. The 40% layout will require a lot of combos to get anything done, and the keys are so close together that if you want them to line up with your fingers, you'll need to bend your wrists to the side (ulnar deviation), which isn't good for you. If you keep your wrists straight, you'll have trouble hitting the innermost keys on the bottom row with your thumbs. I'd suggest using the 2 2u spacebars if you do, and be sure to lube the stabilizers - it supports PCB mount stabilizers, so you can get them nice and quiet.
Regardless, this is still a great little toy, and something you can use for typing on the go, as an experimental testbed, or just an ultra-minimalist setup.
Would recommend to a friend.