Perfect FIT Both the keyboard and mouse are just what the doctor ordered. I've never had a true ergonomic keyboard OR a verticle mouse but they are perfect. I thought the mouse would be difficult to adjust to but it just felt like I was shaking hands with someone. I like it already.

The best value in thumb trackballs. Shipping: excellent. Product: excellent. Other thumb trackballs tend to have places where the trackball doesn't run smoothly, but I've yet to have a problem with Perixx in that regard. I got the wired trackball because its response time is faster than the wireless, making it a better choice for time sensitive input.

Good service, good product Perixx was remarkably prompt and helpful about addressing my pre-purchase questions. Shipping was quick. The product I bought (Periboard 613) seems very well designed--as a Mac user, I love being able to make it a Mac keyboard with just a switch rather than remapping the keys myself, and I'm impresses that they include a tool for swapping out the key caps. The only remaining question is my long-term experience with the keyboard, and I haven't had it long enough to answer that.

The keyboard they sent me doesn't work… The keyboard they sent me doesn't work correctly. The 5,6,=,-, numberpad and shift keys don't work correctly. This is the case whether you plug it into a desktop PC or several laptops - the problem persists, and they will refuse to provide refund or replacement. Do not order from their vintage keyboard range if you can help it. They look nice, built to last, but don't carry the same level of function as a £10 keyboard can from your local electronics store.

Highly recommended Small compact size fits anywhere space is limited. Large font size with backlighting makes excellent visibility of the keys. However, I wish the backlight is designed to only illuminate the letters but not create a halo around the keys that would appear more elegant and less distracting to the eyes (similar to the backlight of Periboard 326 which I also own). I also would suggest Perixx use a warm neutral white backlight instead of the bluish backlight.