Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless

I purchased this keyboard so i could setup a dual monitor setup for my Macbook Pro when I am at home. This keyboard/mouse combo is awful. The mouse bothered my wrist a great deal if i held my wrist in the recommended position. The thing that really makes this combo awful is connectivity. After about two months the dongle only works sometimes, so most of my days consist of plugging in the dongle then unplugging then plugging it in again until it finally decides to work. I wanted a dual monitor setup to increase my productivity. I think this products inability to work properly has completed killed any productivity increase that I may have gotten from the dual monitor. I switched to Mac this year and after my experience with this keyboard and mouse this will be my last Microsoft purchase. Their products are too unreliable.