short version: rust and misfires
slightly longer version:
aside from the triggerguard being very fragile and prone to breakage, the trigger and safety group is hideously complex, is unprotected metal, is nearly impossible to clean, and rusts quickly (and stealthily).
most of the issues I've had personally revolve around the safety contraption's sear and bolt handle locking bars. these positively engage but passively disengage, thus tend to hang up in their respective holes, causing a misfire(sear) or inability to open the bolt.
they're very accurate (I've owned 3) but they tend not to go "boom" reliably, and have been down for service more than any other make I've owned.
YMMV
