Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Awful, do not buy

A truly terrible purchase that I regret. First, the installation bracket is impossible to work with, buy the time I managed to get fan into place the bracket bent and would not snap into place. I was forced to drill holes in the plastic housing to drill into the stud. Despite claims, there is no way to put this in without crawling into the attic. Finally, the air flow is terrible, it barely moves any air, and certainly nothing near the 90 cfm that it claims. Complete waste of money, I will replace shortly and throw away.