The one downside to a more universal fit camera rain cover, as opposed to a version that comes in a few sizes, is that it might end up being a nightmare to fit and set up. And this is kind of the problem I have with this rain cover. While it does fit every size of mirrorless cameras I threw at it (all bigger than APS-C), there is just so much room left in it. You can honestly probably fit a smaller cine camera in there, though it's not really compatible with all the extra attachments so it still won't make great sense. The clear window on the back is so large it can wrap even the bottom of my camera, though sometimes I wonder if that isn't so that you can see your tripod settings (if you leave the bottom zip open to use with tripods). Still, this oversizedness does make it a bit of a hassle to manage all the extra material. The lens portion isn't much of an issue since there is a integrated elastic to cinch up around the lens. The arms portion aren't too bad because at least it lets you put your arms through even wearing a reasonably bulky jacket. It's mostly the bottom/height of the whole rain cover that makes it awkward.

That said, I do appreciate the little viewfinder hole so that it plays well with the EVF's proximity sensor. I did find that on my larger cameras the hole is a bit too small to fit the EVF, though if I wanted to specifically personalize it for that camera I would easily cut the hole larger. Even if I keep the EVF inside the cover but facing the hole, I am usually still able to see through it perfectly and most of the time the proximity sensor still play along too. I do appreciate the little adjustable shelf over the EVF, which protects it but also keeps your glasses out of the rain too.

Overall, for an inexpensive one-size-fits-literally-all (other than your most ginormous lenses) rain cover this does a great job. It just becomes a matter of if the oversized nature of this design becomes way too much of a hassle in handling... though at least it does mean that once the internal lens collar strap is undone, you can remove most cameras from out from the arm holes instead of needing to open up the zip underneath.