Good while they lasted
Wish i could rate it at 2.5 stars.Pros: airflow was great, noise was acceptable with the 7v adapter, cool looks. Cons: not made for horizontal mounting, loud at 12v, all four i ended up getting made strange noises after a month. At 12v they're loud but they do move an amazing amount of air. Horizontally they vibrate like crazy. Of the three i needed one of them was doa with a horrible bearing whine. Now i have three more that either click, buzz, or are starting to whine as well. As well the replacement i got had flickering led's.Wish they would've worked better. They feel well built but i guess it's what's on the inside that really counts.