OK. I like it, and I'm going to keep it, but just because, IMO, it is better than the competition doesn't mean that it's perfect. From all the 5 star reviews was prepared to think it the greatest thing since sliced bread.
The clip is good. It will fit on the kindle and is versatile enough that even with a cover will either fit over both or slip between the cover and kindle. I'm a little worried about how durable the "spring clip" is. It's a clothes pin design.
Mine did come with batteries installed, but no extra batteries...as many people have mentioned that they received. It takes two 3V CR2032 batteries. Pamphlet says they last 25 hours. I did look up and Amazon sells 25 for $5.81, so not bad. However, to change the batteries you have to have one of those tiny philips head screw drivers to open and close the battery compartment.
Also, I have the smaller kindle. It does not have hot spots nor areas it doesn't cover, but there are certainly areas that are darker than others. It makes me wonder how it would do on the DX.
I know that I've pointed out the negatives, but there are many things that I like. They've been pretty well covered in the 5 stars, but one thing I do like is that when you close it up, it is sturdy. I would feel comfortable just sticking it in my pocket and it being comfortable that it wouldn't get damaged. I think that's a huge plus.