Summary: Das Keyboard is a perfect feeling keyboard. It looks beautiful. It's just that it's a bit expensive for a keyboard that doesn't really add any significant functionality. The absence of a feature (labelled keys) is probably the main selling point, and although I've found it helpful for reducing the amount of looking at the keyboard that I do, it's still a LACK of a feature. Mechanical keys are great, but probably don't make this keyboard worth the money.
Summary: This keyboard is blank, but hopefully you already knew that. Typing on this keyboard feels like typing on a $100+ keyboard should feel like: effortless, crisp, and extremely responsive. I went for the softer model. It's still plenty clacky but the resistance is a bit lower, which suited my tastes. The keyboard does have a couple known issues. The delete key can be quite squeaky, although they have a video on how to lubricate it.
Summary: Das Keyboard's Model S Ultimate's reputation as a productivity enhancer is not a myth. The joy of the tactile press and click of the keyboard is probably subjective, but those who know what they are getting into will be rewarded. The sound of the keyboard is a key selling point, but those who dislike loud keyboards should obviously steer clear. The keyboard is glossy and solidly built, with the additional USB ports making a great piece of tech phenomenal.
Summary: My shift keys and backspace key squeak straight out of the box. It really is frustrating more that I have to lube and fix it than anything. Just really frustrating. Everything else about this keyboard is magical. It is also worth the few extra bucks to get the "silent" mode.
Summary: This keyboard is actually much more sturdy than it looks. I was pleasantly surprised to pick it up out of the package and have it feel much heavier than it seemed. I've been using it at work and I absolutely love it, it makes typing fun again for someone that does it for over 18 hours a day.
Summary: This is a well rounded keyboard. I subtracted a star because this keyboard is significantly higher relative to the desk when the keyboard is on top of a desk (not on a drop out keyboard tray). This causes the angle of my wrist to increase while typing since I don't float my arms and elbows when typing.
Summary: Keyboard was built solid and feels extremely sturdy As others have mentioned however, the backspace key does sometimes squeak and make a metal grinding sound. Also, the glossy finish is a pain to keep clean from dust. Actually typing on the keyboard is a dream, and the keys all feel 'crisp' and durable. Prepare to use the backspace key a lot if you are not already a great touch typer though!
Summary: Some other reviews of this keyboard cite how impressive it is, how magical typing on it feels, and how it rubbed the reviewers on the knee and asked them if they lost weight. Most of that is true, I guess. Going from a membrane keyboard to this keyboard didn't really change the way I type, although the keys do make a pleasant sound when hit and the blank keycaps are wonderful. Also pretty good for freaking your less tech-savvy colleagues out.
Summary: I have the Model S Ultimate, Cherry Blues. The feeling of typing on this keyboard (and the sound) is amazing. The biggest issue I have with this keyboard is the spacebar. Mine not only squeaks, but lodges itself at half-down, causing massive space problems. I've already had to delete quite a few spaces in this review. The second (and minor) issue I have is with the number/caps/scroll lock lights.