This is a quality product and the whole design is good. However I feel you need to counter balance it with a diving weight of your choice depending on weight. Just cable tie it on the back. Then add on a Viewfinder /Magnifier For any DSLR with 3" LCD screen and you have a superb product.
I got this for my Nikon DSLR D7000. For shooting video this is a must have as it gives great stability and makes shooting in sunny conditions a breeze. Very well made and at a great price - some of these eye pieces are stupidly expensive. I am extremely happy with my purchase and am using it with an Opteka shoulder brace which works well - although I weighted the back of the brace with a 1KG diving weight which I saw some one do on you tube. Good, professional results while not breaking the bank.