Instruct: Classify the given review as either positive or negative.
Query: Adjustable width but VERY thin plastic vinyl window shade

I bought this item for my classroom since I couldn't find the correct width of a shade anywhere else. In the instructions to have the shade fit the window, the roller was adjustable and the shade was able to be torn to fit the roller. It attached then to the roller with double sided tape already on the roller. But the shade was so thin, that just attaching it to the roller, made it rip more. Room Darkening??? No, way.... It does say "Economy" on the package. Maybe there are different levels of room darkening. I don't feel for the price that I received an equal quality item.