So I got the battery grip two days ago received. Unfortunately I have been waiting quite a long time, which were now almost two weekend after ordering. But for a third-party I think that's fine. The handle fits almost perfectly to my 600D. He is in some places about, but that's not so bad. Presumably, a replica of the original mold. The three buttons and the shutter release button can be pressed well, but also look rather cheap. The 'wheel' to adjust the aperture or shutter speed seems a bit loose, but is not so bad because it is not drankommt as fast. The rubber coating, in contrast to the rubber coating of the camera a Verarsche that my only real gripe, because it is cheap, meaningless acts it stuck and could, in my opinion, fall off at any moment.
Conclusion: For someone like me who wants to invest relatively little money in the equipment and more money in the lenses, a good choice. Large defects do not exist, nevertheless acts but cheap, so 4 out of 5 stars.