Very thick, but: the S4 is thus better in the hand (subjective, but previously it was just too thin) and the camera is better protected (where Samsung has had the idea that the camera should look out from the back ?!) , But it could still quiet a tick be thinner. Considering that the product description replaces the original battery cover in look and feel is (but this is 100% not true), there is a star deduction, although me not so much the thickness interferes.
Sometimes the phone believes so easy to load, even though it is just on the table. That may very well be a Samsung mistake. Therefore, no rating for this deduction.
The white plastic is blue in my jeans pocket! The jeans is new, but still, how can that be? There is one star less. I recommend the black plastic definitely.