Summary: This protector is of high quality. It's a very thin skin and fits well. I really like how it looks and the protection it provides. (I tend to spill, so this is important!) I'm disappointed though because I can't seem to get used to this new way of typing. I might not be able to use it.
Summary: this is much better than those cheap silicone keyboard skins. this skin gives you the old fashioned feeling of typing on a Dell keyboard again! I was skeptical at first, because the skin cost half the price of the keyboard itself, but I love it. you will too.
Summary: I bought this because the white keys on the keyboard get very dirty with any regular use. While it does what it's supposed to do I don't like it. First, while it protects the keyboard, it also gets dirty and I couldn't clean it very well. And second, it makes the typing quite a bit softer, which to me causes more mistakes. I like to hit the keys a little hard and like the feel of the keys as they are on the keyboard. I don't like the soft feel of it at all.
Summary: Moshi cleargaurd FS US layout for Apple Keyboard with Numeric Keyboard reduces high frequency component of keyboard clinking sound. Some would not be interested in this small acoustic difference, but I like it. Tactile feel is OK with Moshi clearguard. I marked one star off because of its high price.
Summary: I bought this keyboard cover because I know how lazy I am about cleaning keyboards carefully, and this comes with instructions which show you how to clean the cover really easily. It doesn't impede typing at all and it actually makes the typing noises nearly disappear which I didn't expect, so that's an added benefit. It's barely visible on the keyboard and it's quite nice on your fingers.
Summary: this cover works well, but beware - if you use hand lotion, the plastic will stain. i'm looking for a replacement cover now, as mine is very dirty looking after a year's worth of use. tried scrubbing, the properties of the oils in the lotion has reacted with the plastic and is permanently yellowed in certain areas. my non-lotion using coworkers moshis are fairly mark-free though.