Summary: I purchased one for my wife's birthday because I was looking for a lighted keyboard. The reviews were very positive for this keyboard so based on this info (as well as seeing one in a local store) I purchased it. My wife loves it for the lighted keyboard as well as being quiet as each key is pressed on the keyboard. I told her I would like one for my birtday, so here I am typing on it right now.
Summary: I bought my first one 4 years ago and have had zero issues. The keys are comfortable, quiet and well lit. I recently purchased my second one to have at my office. I honestly love the feel and quality and would own a third if I ever have the need for it.
Summary: Logitech has been my choice for anything they make since they offered full product guarentees back in the day. The keyboard is sleek and it features all that I needed and more, multiple backlit settings for varied light intensities, and the keyboard is slim the keys are not mushy. Love it!!!!
Summary: I bought this after my MK700 keys started sticking. Was reluctant to go corded but have been very happy. I love the backlight in my office and find the keys very smooth and fast typing. I thought I would miss a bigger BACK key but it seems just fine and big enough. I would like the keyboard to slope a little more but am satisfied.
Summary: Best keyboard that I have owned to date. Makes nightime viewing easy. Better than wireless unit. No batteries to buy, it run off USB port. Plug and play, special functions work immediately with no additional software necessary.
Summary: if you are looking for a thin, keyboard with nice features, this is it. I love it so far. the only problem is that your computer may not recognize it right away, install the driver first then connect the keyboard :-)