I have 2 of the Keychron K2 keyboards, one with blue switches and one with brown. They make good Mac keyboards and work quite well for Linux and Windows too. They're solidly-built, have a good set of features, and I haven't had any issues with them at all.

They come with double-shot ABS keycaps and the keycaps feel quite good in terms of shape and being sturdy. I do prefer PBT keycaps in terms of feel, but the stock ABS keycaps will be fine for now. They're double-shot, so the legends won't wear off and by the time they get worn and shiny I'll have decided what keycap set I want to replace them with. (Keychron does offer some replacement keycaps sets of their own.)

I haven't used the Bluetooth features of the K2 yet. I use a KVM switch to control several computers, and it's easiest to have the keyboard wired to the KVM switch. You can evidently connect to several different computers with Bluetooth from the keyboard and select between them, kind of like some of the Logitech wireless mice let you do.

When comparing the K2 to a Ducky One 2, Das Keyboard 4 Professional, and MK Typist keyboard, all with Cherry MX Brown switches, the K2 feels as solid as any of them overall. I'd say there's a bit more key noise when hitting the bottom of the switch travel than with the Das Keyboard or MK Typist, and about the same as with the Ducky One 2.

The layout of the K2 is very nice IMO. It's more compact than the typical TKL keyboard, but doesn't require lots of multi-purpose keys with modifiers as is needed with any layout that's smaller than this. It does take a bit of getting used to, but that's true of any new layout that you try. The only thing I'm finding to be awkward is the arrow keys. I was used to having space around them, and being a bit sloppy in my finger placement. With the K2 you start hitting the adjacent keys if you're sloppy about pressing the arrow keys, but I'm quickly getting better at it and it's feeling pretty normal now.