I have found no quality problems at the processing of the case. The material feels dibasic. Only the zipper is indeed a bit stiff. The battery fits in perfectly. Whereby the space in the cover, in which the accessory is to be accommodated, it seems to me a bit too small. The reason is that the large battery by about 1 cm is sufficient in gegenübeliegenden cover inside. With a little push and pull on the zipper it goes, but that is certainly not the intention.
For this reason I give for this useful bag only 4 stars.
Addendum (01/22/2014): After some time, the zipper was supple and the bag can also close perfectly now. Thus there is a star more!