This is my favorite light so far (since I got my KT and no longer can use my lighted cover from my K3). It clips on to my cover without leaving any marks, it's easily adjusted, and the brightness is similar to that of my old lighted cover. It lights up the screen evenly. The battery has lasted so far, but the nice thing is having the peace of mind that when it goes out, they sent me an extra one as a back-up. I think I have a touch of OCD and I can't stand anything touching my KT...I found that I can keep my light clipped to the front cover, and when I fold it back, it is in perfect position for reading (just a hint). My only problem is that when I'm reading in bed I feel like I have to do a little too much adjusting of the light to get it right. It shines brightly at the top and as I'm adjusting to get it right, I feel like it is too bright in my eyes. Full disclosure: I suffer from migraines and this could be light sensitivity on my end. Once I get the light in the right position it is fine. (Maybe if I inclined more in bed, it would be better too). I hope this helps. I'm happy with this purchase, and I will probably use this and be happy with it until the lighted cover prices drop or I get a KSO to get a healthy discount on it.