Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Notice the common thread?

Listen. I am likely to buy another one of these lenses, because they take EXCELLENT pictures. But when people talk about how flimsy the lens is, they aren't whistling dixie. I broke one of these lenses accidentally in a fluke accident that would not have damaged ANY of my other lenses. It's a problem because I'd gotten so used to using this lens it became my default. If you do happen to purchase this lens either be prepared to buy another one--and given that it is comparatively inexpensive this may not be a problem--or be prepared to really really care for it.