Been a week with the HHKB Pro 2 so far.
Here it is with some other Topre boards (and some not)...

Funny thing is that after two decades of the standard layout, the backspace key took me no time to get used to and now I struggle with it on other keyboards. I didn't expect to enjoy the layout very much but to my surprise I quite do, especially the arrow cluster. I'd prefer Control to be in the bottom-left corner, still, as I find it awkward to use the Ctrl+Z/X/C/V keys.dd
The only thing is that it's quite a bit louder and less smooth than the Realforce 87U. In particular, the central keys are very 'clackey' compared with the outer keys, making typing sound more noticeable to others. My left shift key is noticeably darker than the others, as is 'F' and 'J' and kind of '.'. The stabilizers are pretty much silent, which is quite rare for any board. The edges on the left and right side of the top case overhang the bottom a bit, feeling kind of sharp when you move it around from the sides.
The weighting is about just perfect for me, and it feels a touch heavier than the 45g uniform 87U. The typing angle is oddly steep (as you can kind of see in the photo above), though I haven't really found this to be an issue yet.
I'll keep breaking it in and seeing how it is. Despite some flaws, it's one of the only keyboards I'd describe as "fun" to type on. Perhaps some of that is for having to figure out some of the key combinations needed (such as Ctrl+Shift+Fn+K to highlight the line up to the cursor).