Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Flimsy Keyboard

I don't use my keyboard that often, yet even with infrequent use, the space bar broke after only 4 weeks of use. The keyboard is a cheap imitation of other better models. The shape is the same as some other MS models but the quality just isn't there. Go with the MS 4000 model, it's much sturdier and has all the same bells and whistles as the 6000. Plus the mouse is ambidextrous, which may come in handy if you ever need to switch hands (as I did for a while due to an injury) or have someone else use the computer.