Got this for my husband as a birthday gift, and he's used it every night since. It seems very well made, and the batteries seem to be lasting for a pretty long time. It's not very heavy, but still feels fairly solid. The clamp is padded on both sides, so it won't mar your book pages. The light has 2 LEDs for brightness control - press the button once to turn it on with both LEDs, press it again to dim the light by having only one LED on, and then press it a third time to turn it off completely.