first , I agree completely with all the positive review , especially the two extensive , detailed review on the main page -- bravo to the writer . I have be use Logitech product almost exclusively since the company make its first mouse . at present , I have five mouse , three keyboard and a webcam . the only real dud be a scanner , but no one 's perfect . in general , Logitech product be superior to they competitor , especially Microsoft 's . my new k350 replace a less-than-two year old m keyboard which be prone to key not work when they feel like it and have the keyboard handle equivalent of a Mack truck . the k350 be a delight right out of the box , for all the reason give by the other reviewer . I do have two cavil : 1-i like a keyboard with a scroll-wheel on the left side of the deck so I can use both mouse and keyboard interchangeably . grant , no one make they anymore -- I have two make by m and one by Logitech . I buy the k350 because the user 's quide be vague about reprogram the Zoom key - it even fool the salesman , who also check the Logitech website . it take e-mail and call to Logitech to find out it be not possible . -lrb- at least , Logitech do provide extensive customer support , without charge . try to get help from the `` other big guy . '' -rrb- the keyboard would be enhance by make the Zoom key programmable like all those other key and the Users Guide more information-oriented and less-pr . 2-i have have recent durability issue with some of the mouse -- my MX Revolution fail and be replace three time , all under Logitech 's excellent warranty . Logitech need to look at the reliability of they chinese fabricator to make a product that be as excellent in durability as it be in design concept . I would like to believe that this keyboard be not go to need replace in the near-future . all that say , I still prefer Logitech product and would recommend they with almost no hesitation . alas , ten month after purchase , the keyboard start throw off anomalous key-stroke and refusal to register key-stroke . it take several call to Logitech , where I be tell to remove the battery and punch some key several time . this be a temporary fix -- and how many time should a person have to stop productive work to play with he keyboard ? finally , Logitech recognize -- whatever it be they recognize -- and replace the keyboard under warranty .