Happy Hacking Keyboard Professional 2 vs Kinesis Advantage2

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.

Having multiple keys under the thumbs lets you keep the rest of your hands still, and helps prevent reaching. For example, the backspace key on a regular keyboard is way in the top right corner, while on the Kinesis keyboard it's under the left thumb. So, to hit the backspace button you just need to move your thumb while on regular keyboards you need to move your whole right hand and stretch your pinky to reach it.

This keyboard is sculpted to fit the curvature of your hand more naturally than regular flat boards. This helps reduce the risks of suffering repetitive strain injuries.

One of this keyboard's best features is that the keys are vertically aligned in straight columns, so that you're not constantly exercising the muscles to move your fingers slightly to the left or to the right. It makes a huge difference.

The large, raised palm rests provide comfort while typing.

Besides the option of easily changing between pre-programmed layouts of these 3 systems, extra OS-specific keycaps come with the keyboard.

This keyboard has several programmable options, like Macro recording, key remapping or keyboard layout (the keyboard can be changed from QWERTY to Dvorak with the touch of a button).

Because of its size, this keyboard stands firmly on the desk and doesn't suffer from unwanted movement during use.

The keyboard has the dvorak layout built in, so you can switch with a keypress.

This keyboard has numerous ergonomic advantages over a keyboard with a standard layout. Some of them are obvious and some are subtle, but they are synergistic and result in a typing experience that places far less stress on the hands. Learning a tweaked keyboard layout is a small price to pay to avoid RSI (repetitive strain injury).

On common keyboards, both thumbs rest over the spacebar, meaning they can knock against each other. On the Advantage 2 keyboard, only one thumb can press the keyboard, eliminating this problem.

This layout, because of its uniqueness, is perfect to learn touch typing. Even for those that were never able to learn it with common keyboards. It still requires practice to get proficient, of course.