Yes, I was amazed and surprised by how fast I adjusted to the HHKB Pro 2 layout. Not only did I adjust, I found the layout so ideal that I have remapped all my other keyboards to the HHKB Pro 2 layout or something as close to it as possible.
The only negative for me about the HHKB Pro 2 is the return stroke clack of the keys, which is probably accentuated by the fact that the switches are case-mounted instead of plate-mounted. This is why I currently use my RF 879b 55g most of the time, but I still keep the HHKB Pro 2 in my keyboard rotation along with my IBM XT.
Can't the return stroke be lessen by a silencing mod like Spicebar did on his RF/Novatouch? Which I guess would be equivalent to what a HHKB Type-S is about.
It would do what a Type-S does but with a very noticeable reduction in switch travel and a change in the tactility of the switches - some reviewers have reported that silence modded Topres make the switch feel linear, thus losing all the tactility of the Topre switch.
This is not necessarily a bad thing as some might prefer a more linear keypress but Topres are, in the end, extremely premium rubber dome keyboards and the tactility is part of what sets it apart from cheap rubber domes. Of course, there are other reasons to choose Topre, but to me, the tactile "bump" at the start of the keypress is part of why I love Topres. This is a personal preference though, and others may disagree.
The Type-S comes at a premium over the regular model but it does have elongated sliders to accommodate the silencing foam so the feel of the keypress is virtually the same as the non-silenced HHKB, with the tactility at the very start of the keypress. The result is a very, very quiet keyboard that does not sacrifice the wonderful Topre feel.
I've only tried regular Topres and Type-S and can confirm the feel is very very similar if not exactly the same. On the other hand, I haven't tried silence-modded Topres to confirm the loss of tactility.