I've been shooting stills for over 30 years, and Canon digital for the last 6 years. I'm branching into video and bought this magnifier for my 7D so I could use the lcd for critical focusing and viewing in bright sun light - it works great for both. This is one of those rare, relatively inexpensive photo accessories that works great. I think you get more than you pay for. It comes with a plastic frame that has a hard, clear, lcd protector built in. The frame has 3M stick-em around the rim and fits perfectly over the 7D viewfinder. Once the frame is secured to the camera, the magnifier snaps into place, so you don't have to hold it there. The eyepiece has 3x magnification and a diopter adjustment built-in, which is really nice - I don't need to wear my reading glasses to see the lcd clearly for fine focusing. The optics in the eyepiece even appear to be coated! The only thing that concerns me a bit is the durability of the hinge that allows you to flip the magnifier up out of the way while leaving the unit mounted to the camera. But, I'm not too concerned. If it breaks, I'll just glue it together in the closed position - I don't see a lot of use for this feature to begin with. Given the higher prices of similar units, some with fewer features, I'm really happy with this. I'd say try this before spending more on another brand. If you like it (and I bet you will), keep it. If not, send it back and spend 2 or 3 times as much for a different brand. A surprisingly good product at a great price!