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.
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.
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.