When comparing Model M vs Realforce 87U Tenkeyless, the Slant community recommends Model M for most people. In the question“What are the best keyboards for programming?” Model M is ranked 14th while Realforce 87U Tenkeyless is ranked 16th. The most important reason people chose Model M is:
Buckling-spring switches are hardly used anymore, but they give some of the best tactile response when activated.
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Pros
Pro Tactile and "clicky" buckling-spring key switches
Buckling-spring switches are hardly used anymore, but they give some of the best tactile response when activated.
Pro Very sturdy
Although heavier than a modern keyboard, this keyboard is built like a tank. There is no flex, and the components were built to last.
Pro Solid construction
Quality construction, good materials.
Pro Clear separation of key groups
Pro Attitude
Clearly signals that I'm serious about what I do and how I do it.
Pro Removable / replaceable keycaps.
With a hook beneath the caps that you have to get to, you can detach those keycaps and replace them with others.
Pro Pleasant tactile feeling
This keyboard is equipped with mechanical Topre switches that offer a pleasant tactile experience that resembles playing the piano thanks to their complicated mechanical design.
Additionally, Topre switched doesn't feel loose or wobbly since the mechanism is actually attached to a rigid plate that is placed above the printed circuit board.
Pro Doesn't produce much noise
You will not draw your colleagues and members of household insane while working with this keyboard since the Topre switches produce less noise than the traditional mechanical switches like the Cherry MX-Red or MX-Brown.
Pro Key caps feel wonderfully silky
Pro Compact
Thanks to its tenkeyless design the Realforce 87U is very compact and, therefore, doesn't take up too much space in a bag.
Cons
Con Noisy to type on
Floss mod is available for the Type M to make the keyboard a little more quiet. However, since it's still a mechanical keyboard, it will be noisy. This keyboard will not be appreciated in the office.
Con Very hard to acquire
Out of stock for decades.
Con Ugly as hell
Con Some driver issues with USB-only computers
Using a PS/2 to USB adapter can kill rollover.
Con Very large
Measuring nearly 20'' x 8.5'' x 2" ( 50 x 21.5 x 5 cm), this is a very big keyboard. It will be hard to fit into a minimalistic styled desk setup, and might even be too big for some smaller desks.
Con Lacks some modifier keys
The Model M lacks both of the meta/super/cmd/Windows (depending on the OS in question) keys and a menu key.
Con Tenkeyless design
This keyboard lacks numpad.
Con Cable position is inconvenient
This might not be the best option for those who's workspace is limited since the keyboard's cable connector is located on the right side of the Realforce 87U - just at the place where you would typically place a mouse.