Summary: I am a mobile DJ and I purchased this because many of my gigs are set in a dark atmosphere. This product works perfectly. I have a big 17" laptop and I get good light coverage. Yes, it does have a spotlight effect, in which it's brightest in the middle of the keyboard, but the light falloff is enough that I see the rest of the keyboard, including the numpad to the right. A pretty cool feature is its low/high switch. Low uses 4 of the 8 LEDs and high uses all 8.
Summary: Light goes off when laptop is shutdown. So you need to keep the laptop on to use it for reading. And if your laptop's USB port is only on one side, it might be awkward for those that want light on a book on the other side. We find it works great for our needs and would buy another.