Used it this past saturday, and well, it certainly does what it advertises. While the post/target isn't a perfectly clear picture on both at the same time, it's a big improvement. It also does this weird zoom thing that you can somewhat control, hard to explain.
I got down into sitting and my first string was a 100-3X, nothing spectacular and the string didn't feel great at all. I get into position for string 2 and I cant see anything. If I'm looking at the front sight, the background/target area was one color. I honestly had no idea what was going on and shot the string to the best of my ability, and kept my post on what I thought was the general area the bull was at. Target goes down, score board rolls up...59. Turns out my aperture fell out, I thought it was just my eyes taking a shit on me.
After talking with CC/MISO, they're sending me a new aperture, which is nice of them, but I much would have preferred for my sight to not fall apart after 34 rounds. This match decided if I received a master classification, and I didn't make the cut due to those lost points. Oh well...
So, to conclude, I think it would be beneficial to those with vision issues, just make sure you put some rounds down the tube before using it in a match.