The first thing I noticed about the
No Scope that had me a bit hesitant to use it is that, while it's not overly sticky, there
is a layer of adhesive to stick the
No Scope to a monitor or television. Some people would be adverse to sticking a sticker to the front of their expensive widescreen television. I carefully stuck it on ever-so-slightly, so that it would hold, but that it was just barely stuck on. J.R. Nip later noticed this and figured it to be a failing to get a good purchase on my part, so he stuck it on real good and proper. Psibabe later removed it without too much difficulty, being careful not to scratch the screen, of course, and the television seemed none the worse for wear.
The only other gripe I would have is that the red was a bit difficult to see at times. If the targeting reticle outline had been done in more colors, say red traced in black, traced in white, then it would be easy to see, regardless of what colors were on-screen in the game.
The usefulness of the No Scope increases with the number of FPS and third person shooters you play - especially if you don't use the screen for television and movies in between, limiting the number of times you have to remove it. For best results, you should make sure the television or monitor is clean before affixing the No Scope, as dirt will eventually collect on the No Scope and reduce its ability to stick.
All-in-all, the No Scope is a useful solution to a frequent issue for shooter fans and worth checking out at around $5.00 USD for a 5-pack.