Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Serious junk

I bought this mini-mouse to replace a 6 year old Kensington USB mini-mouse whose scroll wheel was dying. I figured how hard could it be find a basic replacement. Harder than I thought, apparently. This Iomega mouse looked cheap right out of the box and feels very flimsy. All of which I could get over if it was actually functional, but it's not. It's rather insensitive to movement so you find yourself jiggling it around to get it to start moving your cursor?! If you don't use it for a few minutes, it appears to go to "sleep". You have to click a button or tap it on the desktop to wake it up and remind it to... be a mouse! Remarkable they would sell a product like this. I emphatically recommend you try a different product.