If installed correctly most of them are fine. I have used them on a lot of ARFs I have assembled for other people without problems but I use Robart or Dubro hinges on my own planes. One of the problems I have seen with the CA hinges is people that go back and try to add more glue. For one reason or another they tend to loosen up with the second helping of glue?? I think it is Ken or Minn that has posted CA hinge instructions here on RCU. Been a while sense I have read them but as I recall there were some instructions posted.