(This entire review was written using the Celluon Magic Cube and a Kindle Fire HD.)
This device caught my eye during my search for a PlayStation 3 keyboard; I eventually ended-up getting the
PS3 Wireless Keypad, but its lack of back-lit keys left me wanting something more visible in low-lighting.
Come this holiday season, and the Celluon Magic Cube appeared as a gift from my wife. Not only did it pair easily with my PS3, but it also paired with my Kindle Fire HD. This device works on basically any flat surface; right now it's doing just fine on my wooden kitchen table, and has given me no problems on the coffee table, walls, counter tops (both stone and synthetic) and it even works (mostly) on low-pile carpet. The device even seems to work when the keys are hardly visible, as evidenced by a test on the black stone counter at my work.
The Magic Cube gives-off a digital "blip" when a key is triggered, and shift functions work just as on a regular keyboard; you hold "SHIFT" with one finger and trigger the relevant key with another. There is no indication that "CAPS-LOCK" is activated, and there is no volume control for the sound; the sound is not really louder than a regular keyboard, but it's a different frequency. However, unlike previous models: the newer model does provide audible feedback for function/modifier keys like shift, caps-lock, etc.
Holding the "Function" key and pressing the mouse arrow activates a multi-touch mouse, which works quite well. I had no idea a mouse cursor would ever appear on my Kindle Fire HD screen, but there it is.
Typing with this device takes some getting used to; the keys don't seem to trigger best when typing on the characters directly -- in the middle of the keys -- but instead seem to do better when aiming just below, or on the bottom border of each key. This is especially true for the space-bar, which tends to give you the letter above the spot where you touched it instead of the space, unless you touch closer to the bottom border. However, this is easily remedied with increased familiarity, and this is ever less a problem for me.
I had some veteran/professional touch-typists try this device, and while I don't doubt they would not quickly master this with some additional practice, their primary results were illegible; I observed that this was mostly due to them aiming at the center of the keys, and a lack of familiarity with the layout, which features some punctuation in non-standard locations. I myself am no touch-typist -- I am squarely in the two-finger "hunt-and-peck" category -- and have little trouble typing at virtually the same speed as on a regular keyboard after little practice.
Overall, and like many others have said: the Celluon Magic Cube gets better the more you use it. It enables me to type more easily in low-light situations, so it's an improvement for my PS3 typing needs. I have also started to use it in-conjunction with my Kindle Fire HD at work, which makes web searches and e-mail composition more expeditious than with the touch screen. The Magic Cube is definitely more portable than any other keyboard with a comparably-sized interface/surface, and it definitely turns heads when I use it in public; not only does it work really well, but it has that "wow-factor" that is missing in an age where so many people have some kind of portable touch-screen device on them at all times.
In the end I am docking this device a star for three reasons: price, layout, and the fact that it needs a separate surface to be useful. There are several exceptional wireless keyboard/touchpad combinations available for comparable (or lower) prices, and though they are not nearly as portable (or totally awesome in function/appearance) it's an apples-to-apples comparison that some might consider. (It is worth noting that this unit is significantly cheaper than it was when it was released.) Next, the unconventional placement of some punctuation and lack of a number-pad might also make this not ideal for professional typists; you'll pretty much always need to look at the keys to find everything but the letters and numbers, unless you dedicate yourself completely to this keyboard, which will pretty much ruin your ability to use keyboards with a "normal" layout. Finally, it may also be a burden to some that it requires a surface to function; you could put a self-contained wireless keyboard in your lap, but this needs its own stable, flat, non-reflective (not mirrored or glass) surface.
However, for my purposes: Celluon's Magic Cube is winner.
Pros:
--Portable; takes up less space than any other full-size wireless keyboard, and is pocket-sized
--Mouse functionality included
--Stylish/futuristic
--Audible feedback
--Power-saving mode ("Fn" & "Back" to activate, touch where the keypad would be to deactivate)
--The easiest ever keyboard to clean
--Adjustable sensitivity
Cons:
--Expensive (though almost half as much now as it was when released)
--Takes some practice
--Battery life is under 3 hours (though it works while charging)
--Strange layout for some keys, most notably punctuation