Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Maybe mine was just a lemon.

I have one of these "punks" (cross between pump and junk with emphasis on junk). The second time I used it it started making lots of noise. I estimate I have used it about six hours now and have taken it apart to see what was wrong with it. It has a broken second stage vane and I can't find any place to get one. Robinair does not seem to offer any parts for what they refer to as the "module", which is the pumping section. They will sell you a new module for 250 some dollars.Or you can ship the entire thing to one of their few service centers and let them repair it. Haven't checked the cost of that, but am betting their fees plus two way shipping would not be less than $250. All for a part that should cost no more than $2.00 and I am perfectly capable of replacing myself. As I say in the title, maybe mine was just a lemon, but I will never buy another Robinair tool of any kind!