It works well. Works on any number of cameras and, if I was trying to do video on a DSLR I'd have one in a hot minute. Wait, I already do have one. It's bolted to my Pentax....so I can shoot some video... Found out that the base of the connector plate is compatible with some Arca Swiss quick release plates. Who knew? You can get it at Amazon for about $120.
Here's the link: Great, Cheap Loupe.
Have fun seeing your LCD better.