This is a very nice cage for the Osmo Action, with two design flaws and one design flaw(?). It's also important to note that I have a SmallRig cage on my Canon 90D and love it. First off, my Osmo Action has glass on both the screen and on the lens. The first problem I had with the cage was that I couldn't get the thumbscrews out of the back with my fingers, so I snapped off the hex. When I pulled them out, I found that the tailgate holes didn't line up with the holes on the cage, leaving the odd thumbscrew tied. I placed the Osmo Action in the cage and struggled to get both thumbscrews into the cage and shut the door. As soon as I closed the door, my glass screensaver, located on the rear screens in all four corners, bubbled up. My biggest concern was the round lens and filter cap/adapter covering the front screen; of course it's terrible. If I were to use 52mm filters it would be an advantage, but protecting the built in protection that is already in place and losing or obstructing the front view isn't worth it. I had high hopes but they came true. shot down. He will come back and I will find another solution. When I started returning I found I was being charged $70 per cage and not the advertised $34.99. That was very disappointing.