Better than the last cover processing but not good

The cover fits perfectly and at first glance it looks very good and stable. If, however, the critical points just considered (the Xperia Z1 Comapct clearly the upper left corner) then falls on here that dieOber and lower half (2-piece diecast) were not put together properly. The resulting notch (or on the corners of about 3mm wide transition part - a small "bulge") then represent a weak point where the cover sooner or later tears and the upper frame member breaks. For me it has (in spite of careful treatment and the knowledge that the upper left corner is a flaw - no crashes or similar) only held about 4 weeks. Since I expect just more of a product at this price!
That's my 2 Cover - the previous product, however, has kept even less - but was also much cheaper.
The other places (everything except the upper left corner) but are well protected.