My SD (book style) has also finally arrived this week and it fits really well!
As someone here mentioned before the inner flap does trigger a screentap though, if you close the case without going to sleep first. Since I have no use for the flap, I cut it out completely, leaving a small rim where the sowing is though, since I was not sure, if it is sown to the case seperately or if the same sowing goes through other levels of the case as well... The cut border turned out white due to the lining and I simply colored that black with an edding...
It looks absolutely ok this way and now I have nothing left to complain about
Regarding the overall price / quality ratio I would buy this case again; I sent SD a description of the flap problem though so hopefully they will modify the design...