The Realforce is a Topre keyboard with a normal layout that is available in both tenkeyless and full-size versions. There are also further customizations such as keys having variable weights based on finger strength, but you can also pick the standard uniformly weighted option.
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Pro Uses Topre key switches
Topre switches are a mix between mechanical switches and rubber dome switches. They have mechanical components, however they are covered beneath a rubber dome which protects the switch. They bring a mechanical feel, and mix it with the durability of a rubber dome switch.
Pro Variable weights option are available.
Variable weights under each specific groups of keys was done in a bid to prevent RSI (repetitive strain injury). For instance the groups of keys that the pinky finger hits are much lighter/softer than say for instance the rest of the groups of keys that the rest of the fingers hit.
Variable weights are done by having either heavier or lighter rubber domes.
Whilst the idea is very useful for normal typing, for gaming the idea is not so great as for instance when dealing with First Person Shooter games that requires WASD keys, those sets of keys would feel very light when other fingers are used to actuate them.
Pro PBT key-caps
PBT (polybutylene terephthalate) keycaps last longer than other keycap materials, and are more durable. They are more expensive than ABS (acrylonitrile butadiene styrene), which is why they are less commonly found.
Pro Silenced option are available.
Silenced Topre are designed for those who does not particularly like the sound of keyboards when being tapped on or for those whom may have concern over others when it comes to using keyboards that makes noises.
Silencing is done mainly by placing a material that absorbs the sound of the slider when it makes contact with the slider housing. This thereby prevents excessive noise when the key has been released after it has been actuated.
The overall effect of a silenced Topre is quite astounding as it may give the impression one is on a cheap keyboard (obviously the reality is on the contrary).
Con Generally not cheap
When the keyboard is not sourced directly from Japan for instance the price may vary (usually higher). At the same time sourcing directly from Japan may only save one a couple of dollars here and there (after including the forwarding/proxy costs).
So ideally it is best to shop around do one's homework to see which is more viable in the long run.
Con Lack of customisation available.
As with virtually every other Topre based keyboards comes with the lack of customisation and with keycap compatibility between each Topre manufacturer.
Overall this may not be a con for the keyboard as Realforce generally sells a wide range of coloured keycaps for Realforce keyboards.
Con Keys can occassionally chatter
It's pretty rare (1 time every 3 months?), but both the Realforce 87u and 103u keys can 'chatter'. The key is not physically stuck in the keydown position, but nevertheless, the input will continuously and endlessly repeat as if the key were held down (e.g. 'sssssssssssssssssssssssss'). Further keyboard input is ignored until you unplug the USB cable. It's an uncommon annoyance, however an annoyance nonetheless.