Hello.
They only experience problems due to ill fitting, if your looking to replace yours, you can get a forge one, or look on ebay, you can get a "copy forge one" (who apparently actually made it in the first place before force stampedtheir name on it) .
You get a green or yellow spring with it, if your running over 20psi boost, use a yellow spring. Use good hose clamps and you should have no problems.
I can imagine people don't fit them the right way or something, but its pretty difficult to get wrong!