I recently tried the no peep. I personally did not like it. I found it to be difficult to set up, even with two people. And after reading the package insert it made me like it even less. It states that if the lens gets wet or smudged such as during a rain storm that it becomes useless. It goes on to state that you should be shooting well enough to be able to shoot without it if need be. Well I like having a reliable peep. for those of you that it works for thats great, but it' s not for me.