Instruct: Classify a given review into positive or negative sentiment.
Query: Wish I had read the other reviews before I bought this pig.

We bought this unit after watching the infomercial on TV. (Now I remember why I stopped buying off infomercials.) Like everyone else who reviewed it, I found the unit to be flimsy but it worked OK for a while. I was surprised, however, when the battery pack went dead after only a few months. I had ordered a spare battery pack with the unit and expected to just pop off the battery compartment door and slide in the new pack. But I think that the expired battery pack must have leaked because the compartment door was sealed shut. So I took the whole unit apart but still couldn't get the old pack out. So now my Shark is a pile of parts in the trash can except for the handle and the "feather duster" that came with the unit. All in all this turned into a pretty expensive way to clean ceiling fan blades!