I have two of these on two different computers, and they've both been working fine. (This is the AmazonBasics USB 2.0 4-Port Ultra Mini Hub, since Amazon might lump reviews for all products on this page together.) The included USB cable is very short, which is fine for one of my computers, but on another I'm using this in combination with a short extension cable to help it reach my desk, where I want it. The short cable may be nice in some situations. All ports work as expected. This is is not a powered hub (except via the bus), so don't expect to charge an iPad on it, but it still works for my smaller devices (e.g., Kindle).The only thing I don't like is that the LED on the top is rather bright and is lit up whenever this hub is connected. I've covered mine with black tape to get rid of this. I wouldn't mind if it were less bright. 

Question: How was the power supply?
Answer: I 'm using this in combination with a short extension cable