Summary: Like I said if you don't care about noise or potential longevity these are great set and forget fans. If it were me I'd spend a bit more on better quality fans. By the time you're done buying 5 of these and returning the defective ones, you could have saved the time/shipping cost toward some solid...
Pros: -If you don't care at all about noise or noise quality these are great throw away fans.
Cons: -Absolutely horrendous noise/airflow ratio. These are loud and either click/tick or howl across 5v/7v/12v all while pushing next to no air. -For comparison my 80mm Scythe Kamaflow 2's at 2200RPM are no louder than these @ 1200 RPM.
Summary: Rosewill makes some very good products but I have to say I am completely disappointed with the product.
Pros: The adapter is a great value for what you are getting.
Cons: Be warned this adapter is not compatible with Windows 8.1. The driver CD that comes with the adapter has the driver for the correct model and a folder for Win 8. Installed driver and removed them several times trying to get them to work, all to no avail. The support web site does not offer Win 8 ...
Summary: I purchased two of these fans to mount on a cabinet door for ventilation of a PC tower. They do the job, so I can't take off too many eggs, but I currently have them connected with the molex adapter and they are much louder than the replacement fans.
Pros: Moves air well, even with fan filters added in front. Braided black sleeving. Includes adapter for 3-pin fan to molex and eight fan screws.
Cons: At full speed, these fans are loud. There is a noticeable whine. Even with fan filters and mounted inside a cabinet. Red/yellow/black wires show through cheap sleeving. White connectors.