Even while it's debatable whether this keyboard is mechanical, this thread is definitely the right place to write about it.
As I have already written in the Blog thread, I have received a new keyboard today. It's a Leopold FC660C. A keyboard with the capacitive Topre switches, which are highly praised, but also debated in keyboard enthusiast circles. The base mechanism of Topre switches is basically a rubber dome. That gives a first impression of Topre switches being nothing but fancy rubber dome keyboards. These rubber domes have a conical spring underneath, which then activates a capacitive sensor under each key when compressed. As this mechanism doesn't close an electrical contact it's very easily possible to build keyboards which support N-Key rollover, i.e. n keys pressed simultanously and registering. Also these key switches don't exactly feel like typical rubber dome switches. The overall impression can simply be shortened down to "smooth". Topre switches feel very smooth. Not too much of a tactile bump, but still very well pronounced. A very nice sound, and in comparison with most other rubber domes a very distinct bottoming out, which gives them a feeling almost like mechanical switches.
The only big problem with Topre switches/keyboards is the price tag. These things are not very common, but very high quality, so the price is extremely steep. Topre, the japanese company behind these switches, produces the "Realforce" keyboards, which seem not at all special, but are simply high quality keyboards which have Topre switches. With a price tag of over $300. Then there are the Happy Hacking Professional keyboards, which are made by PFU Fujitsu, and until a few months ago this was the only keyboard which was made by a different company than Topre to use the Topre switches. HHKBs are very expensive as well, and feature a very minimal design. Too few keys for my taste. Now the Leopold FC660C entered the market. It's a bit less expensive (in comparison with most other keyboards it's still a high price), has an interesting key layout, which suits my usage very well, and has a quite nice build quality as well. This may be one of the smallest keyboards I own, but it's still one of the heaviest. (Definitely heavier than a Cherry G80-2551. Probably not the case with most plate mounted Cherry MX keyboards)
Altogether it's a very nice keyboard, for people who are willing to throw a bundle of money in the direction of third party Topre producers.