Feels plasticky

The shell is very fit but unfortunately at the inner edge has some remains look like degree and not look nice. (These remnants I cut with a razor blade.) The cross in the photo is difficult to see. The casing feels, my feeling is, after plastic instead of silicon to. The S3 is so good in the hand, can be placed on the side of the display without the display touching the surface. To load the S3 in my cradle, the envelope must be removed, because otherwise it does not fit in.