The Mumbi-Leather Case for the S4 is very well made. The seam has been stung evenly. The respective ends of which are double stitched, so that a Auftrotteln the seam is prevented permanently. The leather is strong with no errors (dents or scratches) and about 2 mm. Here the material and the material thickness is optimally selected to protect the smartphones. The tailored leather halves are a perfect fit. The S4 can be tightly slide in the pocket, which is prevented from falling out in non-sealed bag. The inner flow having the characteristics of a microfibre cloth, which eliminates by movements fingerprints. The tab for the retreat has a few days to a slight strain, but in my opinion, still lies in the Tolerance (stretching by about 3 mm).
Conclusion:
The leather case has been processed and looks great from noble. Thus, for me there is no criticism, even if the Cognac color is no fashion or trend color.
So I forgive for Mumbi Leather Case, at the low price, 5 out of 5 stars.