Other than the ergonomic shape and key layout, this keyboard offers absolutely no notable features as compared to many much less expensive keyboards. I feel that it is overpriced by $20 to $30 except, sometimes, when it is on sale, and that Microsoft is, as usual, merely taking advantage of the Microsoft name in addition, in this case, to the terms "natural" and "ergonomic", in order to charge a non-value-based price. The "plug and playability" is convenient, as the keyboard will function adequately, at least on a Windows based system, without even installing the accompanying software. I would, however, recommend installing the software in order to achieve full functionality. There are, however two major physical defects. First, the letters and symbols on the keys are decals and they wear quickly. As this is the only decent keyboard my local store has for under $90 or so, I have now had 3 of them, and in each case I start losing key labels within less than 3 weeks, with the letter "E" the first to go and the "A" following closely behind. Second, there is something about the physical layout of the keys that causes me to hit Cap Lock, instead of Shift, all too often. This creates a lot of extra work when, as usually happens, I do not notice the problem until after a couple paragraphs or so of typing, especially in applications where I cannot do a simple mass change of case as can be done in Word. While I have this problem occasionally with other keyboards, both "regular" and "ergonomic", it is a once in a while thing. With this keyboard, it is a constant continuing problem. It also happens, with a lesser frequency but still more so than on any other keyboard, with the Control key, which REALLY messes up whatever it is I am doing at the time and often causes loss of whatever I had been inputting. This keyboard is in serious need of much more durable key labeling as well as either a physical layout redesign or a function allowing one to easily and quickly disable/enable the Cap Lock and Control keys, short of popping them off the keyboard.