Happy Hacking Keyboard Professional 2 vs ErgoDox EZ

This keyboard uses a 60% layout that forgoes unneeded keys and merges the extra set of keys into the Fn layer. This mimics the behaviour found on most laptops due to size restrictions. Despite this, the more commonly used keys are left intact so that one does not feel too unfamiliar with the more compact layout. In addition to reducing the keyboard's size, it makes accessing virtually every key on the keyboard a breeze.

The Happy Hacking Keyboard Professional 2 is a very well built keyboard that uses materials that give it a tough body resistant to bending.

This keyboard comes with the standard DIP switches to modify key behavior, but you can also completly swap out the controller board or even fork the TMK firmware to make your own keybindings in the firmware. Also available is the TMK controller board custom made for HHKB users.

Eiiti Wada (a Japanese computer pioneer), the co-developer of this keyboard, is a UNIX user and wanted to make life easier for programmers, particularly vim and emacs. He aimed for a keyboard layout that allowed fingers to stay in the home row most of the time. For example, he placed the Control key where the Caps Lock traditionally is. Most *nix users and general power users know that Control is used more often than Caps Lock for various shortcuts. Therefore, this key repositioning makes sense, since it makes access easier, using the pinky fingers while keeping one's hand on the "home row" of keys.

This keyboard’s keys use Topre switches, which have a smooth, interesting feel: each key’s resistance is quickly lost once it starts being pressed. This sensation is accompanied by a unique and pleasantly organic “thock” sound. These hybrid switches have both a rubber dome and a spring which create the initial tactile bump feel and subsequent continuous action. If you want, these switches can be silenced, either by the manufacturer before purchasing or by following some DIY steps (easy to do, but time-consuming).

PBT plastic is a very brittle material that is able to withstand high temperatures, doesn't yellow or wear out easily. The dye sublimation process ensures the inscriptions don't wear off easily (compared to pad printed ABS, for example). This process usually requires keycaps to withstand high amounts of heat for the ink to transfer from one material to the other, something that's not possible with other commonly used plastics, like ABS. Dye-sublimated inscriptions are also better than laser, etched, or engraved inscriptions in the sense that they don't get dirt or dust as easily.

The positioning of the numpad on traditional keyboards forces users to keep the mouse far on the right-hand side. With this keyboard's compact layout, a more ergonomic workspace can be created by allowing the mouse to be placed closer.

Even though there aren't dedicated keys for these functions, they can be easily used by pressing an easy-to-reach Fn key, placed just below Enter. Functions accessible via the Fn key are printed on the front of the keycap.

You can map any key to any position easily using a simple GUI, including making hardware key layers. And, since the firmware is open source, you can modify it to do anything you want. Many of the hardware components can also be altered/replaced by equivalent parts.

You can arrange each side of the keyboard to match your hand positions. Helps keep your body straight and improve your posture.

Because of its split design, the ErgoDox lets you optimize the positioning of its halves according to what's best for your body shape, even if you have broad shoulders and large hands.

The ErgoDox has an open design, so if you want to modify anything at all, you can fork the Github repository.

There are more keys which are easily accessible for touch typists than on common keyboards.

Unlike other keyboards, like the Lexmark M15 and Cherry G80-5000, where the only action performable by the thumbs is punching the spacebar, ErgoDox has extra keys placed near the spacebar, within thumb reach. This prevents the thumbs from being a bit redundant.

Almost all the keyboards have a small row offset (for example, on a standard QWERTY keyboard, the A key is not directly below the Q key. On the ErgoDox, this isn't the case: keys form straight columns. Together with the movability of the two parts you can stretch your fingers straight on, not slightly sidewards. This helps with touch typing, since you just need to stretch your fingers straight onward to reach the key above, rather than stretching it onwards and sideways.

Because of the nature of ErgoDox, within an open source community, there are advancements in firmware being made continuously.

With most programmable keyboards, you have to use their software in order to save and reuse your customizations. Using such keyboards on other systems "degrades" them to their default setting. Since with the ErgoDox the settings are saved directly on the keyboard, no matter the system where you're using it, your macros, tap dances and layers are always available.

The Ergodox doesn't allow you to reach over the centerline to hit T and H with a single finger, or whatever other bad habits you might have. The split design forces you to keep your hands in the right position.

The pre-assembled version offers an extensive 2-year warranty, provided you haven't taken it apart or physically broken it.

You can put the keyboards together, making it very easy to carry around.