Not too bad

I ordered this unit to replace an older Honeywell window fan that I now have running in my attic. On this new unit, I especially like being able to independently control the fans. Thus I can run either one or two fans, and I can have them both running the same direction or have them running in opposite directions. I also like the louvres that allow some degree of directionality with the air.^M
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The first unit I received had an annoying rattle in one of the fans. I immediately RMA'd it for another unit (kudos to Amazon for a quick turnaround on the return/replacement). The replacement unit also seemed to have the rattle, but after it runs for a few minutes, the rattle goes away.^M
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The plastic used for the casing seems a bit thin and makes it look cheap. Fortunately, it doesn't have any bearing on how the fan functions.^M
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The noise level isn't much different than my old fan with both blades running, but the ability to turn off one blade makes it much more usable at night.^M
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Overall I'm satisfied with it. I'd say the construction could be improved upon, but the functionality it offers makes it much nicer than a more "basic" window fan unit.

Annoying Rattle

I purchased this fan and really like the overall design. I like that you can remove the grills for cleaning and it is pretty compact. But one fan is "quiet" and the other has an extreme rattle. Unfortunately, I already threw out the box, so I can't return it. I have to replace this item and will be hesitant to buy another product from this manufacturer.

Works fine, but it's definitely not quiet

A window fan is a good way to circulate air and help keep the room cool at a low cost. Although this unit does work and is well built for the cost, by no means can this unit be called quiet.^M
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At the lowest setting, it has a very audible whine which is high pitched enough to prevent me from sleeping or watching TV at night.The speed settings are all far too high.^M
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It is powerful and gets the job done, but for me, it's worthless.