Lo and behold, in the supplied box is even a voucher for a free Lenspen after written a review (Please note: available only for customers in Germany, for shipping terms)
This to me is not usable, since I live in Austria, but see it as a nice gesture :-)
All in all, this battery grip very recommendable, can technically no trouble keeping up with the original, solely through the optics it is different (optics is me personally, however unimportant, the main thing is, it works and is cheaper (!) As the original battery grip).
ADDENDUM:
I use the battery grip now almost every day during my current Greece-holiday, already show some drawbacks and deficiencies:
The battery indicator starts example, despite two charged batteries often after 10 minutes to flash, which can be brought only by switching off and re-inserting the handle back in order.
After the second day, the rubber began to dissolve at a corner.
Even the battery compartment soon began to wobble ... So here is the cheap price, that's why from 5 to 3 star herabgesetzt..Sehr shame ..