Highly recommend!  Ignore the (1) replies; switch works fine.  If a concern, take the batteries out when you travel, or don't toss in a backpack with a lot of other objects, or tape it; use common sense.  The light beam covers each page well; paperback, hardcover, or Kindle2, attach it to the top or bottom spine or front or back cover, or back of leather Kindle cover; firm grip.  Best light I own, EXCEPT for the one light/one battery Flex Travel, which is my fave.  I feel a person would have to be extreeemly picky not to be able to use and enjoy either of these lights, and they (all colors of XtraFlex2, not just black) work well with a Kindle in a cover.  Clip it to the back cover, not the kindle itself, plenty of room.  Long life and clear light at the right shade, good coverage. Takes very basic knowledge to figure these out.  Very forgiving, unless you drop and step on it. Don't look directly at the light, but its OK to turn into the eyes of a person reading over your shoulder with bad breath. Get a Kindle2, at least.