The IBM Model M is an old mechanical keyboard which started production in 1985. It uses the buckling spring switch, and can still be found in use today thanks to its original popularity and epic durability.
Ranked in these QuestionsQuestion Ranking
Pro Tactile & "clicky" buckling-spring key switches
The buckling-spring type switch is seldom used anymore, but it gives 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 Removable / replaceable key caps.
With a hook beneath the caps that you have to get to, you could detach those key-caps and replace them with others.
Pro Clean separation of key groups
Con Noisey to type on
Floss mod is available for the Type M to make the keyboard a little more quiet but because it is a mechanical keyboard afterall it will still emit noises. This keyboard will not be appreciated in the office.
Con Very large
Measuring nearly 20x8.5x2" (50x21.5x5 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 keys and the menu key.
Con Some driver issues with USB-only computers
PS/2->USB adapter I've used kills rollover.