Let's talk about the layout. As a Vim user, I need my CapsLock->Esc. Fine, so I'll remap Ctrl—but inexplicably, there are huge gaps where the regular Ctrl keys would be. There are no arrow keys or nav cluster, which means you need to use layers or key combinations to access them. I have no problem relearning how to use my keyboard, but dedicated keys are still faster and easier.
This is the part where an HHKB user says I'm doing it wrong. But that doesn't explain the inexcusable absence of Ctrl keys. And that doesn't explain the $300+ price tag when there are better keyboards for half the price.
The one nice thing about the layout is that it keeps the keyboard small. I'd gladly trade a little size for more keys though.
There are other Topre keyboards and Topre clones, as well as good linear switches out there. The switches are not really special anymore. Ten years ago, maybe, but not anymore. If I had to have Topre-like switches, I'd get clones with a better layout and Cherry-compatible stems. This isn't the mid 2000s anymore; there is actual competition in the mechanical keyboard market now.