When comparing Unicomp Ultra Classic Buckling Spring vs Leopold FC660C, the Slant community recommends Leopold FC660C for most people. In the question“What are the best keyboards for programming?” Leopold FC660C is ranked 9th while Unicomp Ultra Classic Buckling Spring is ranked 52nd. The most important reason people chose Leopold FC660C is:
Topre switches are a high end switch which typically cost a hefty premium. They have mechanical components protected underneath a rubber dome which makes them more durable.
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Pros
Pro Quieter than Das keyboards
Pro Keys feel nice
This keyboard uses buckling spring key switches, the same used on the famous Model M keyboard, from IBM. This mechanism gives a nice feel to the keys.
Pro Resistant
Due to its good construction, this keyboard is very resistant.
Pro Topre switches at a good price
Topre switches are a high end switch which typically cost a hefty premium. They have mechanical components protected underneath a rubber dome which makes them more durable.
Pro Solid construction
The Leopold FC660C is a solid and well-build mechanical keyboard. In fact, it's heavier than the HHKB (Happy Hacking Keyboard).
Pro Topre switches are plate mounted
This board's keys don't feel bouncy thanks to it's topre switch design. Since the torpe switches are mounted directly on the plate, the board feels much stiffer overall.
Pro Compact and portable footprint
If you love your keyboard enough to want to use it everywhere, it should be portable, especially if it's as expensive as this one is. The FC660C is very compact and easy to carry around.
Cons
Con Takes a lot of desk space
The Unicomp Classic is huge, so it takes a lot of space on one's workspace.
Con Ugly
This keyboard doesn't look very aesthetically pleasant.
Con Can suffer from squeeky "plastic on plastic" rubbing with the case
Con Very expensive
Con Non standard key sizes
Non standard key sizes means your aftermarket keycap options are limited to non-modifiers. This issue also exists with virtually every other keyboard that utilises the Topre switch.