You have to remember that Geissele has about 9 different models available. So far every one of them has been a near bulletproof design. For some of us, fiddly adjustments are a problem waiting for a critical time to fail.
Agree w/ you on Geissele being pretty bulletproof.
But JP triggers are set and forget. The only time I have seen a JP trigger fail is when it's not installed properly, which would be an issue with anything. They are less complicated than anything else and they just work and work.