Instruct: Classify the given Amazon review as either positive or negative.
Query: pretty good air filter

It's not nearly as loud as some people say it is, at least on the low setting. On the high setting it can get a little loud, but you don't really have to leave it on high all the time, so it's no big deal. Other than that, the big advantage of this air filter is that you don't have to buy an expensive new air filter all the time, so the price you pay is it, no more added on costs months down the road.