Unfortunately, the cover is very easy, making a very probably lose. This can indeed be prevented by applying a tape strip on the bottom, but a better fit would be desirable. In addition, the recording to the hot shoe on a 5D MK3 is slightly different work, as "smaller EOS" to, so that the part can not be completely pushed in. With a cutter and a small file can also fix, only one does not want but tinker at the same things, but wants - unpack, put off and finished. For the price really unacceptable, but wants to have one thing well not to change. In a previous purchase (other retailers) the same game. Who does not want to tinker - Stay away - otherwise up to the price Ok.