I'm not a Microtech user, but if you'll excuse that ... of the Microtech liner locks, the mini-SOCOMs are the ones that I most often see problems with, on inspection (that's inspection, not use -- I don't own a mini-SOCOM). I've gone to shows where I examined 4 at a table, of which 2 (that's 50% for the math impaired) had locks which seemed questionable, just from light inspection and playing at the table. I've heard the exact same story about this knife from a number of other people.
It's a cool little knife, I highly recommend testing it out and making sure you have one of the good ones.
This is concerning reliability, not strength. I have no comments on their liner lock strength, I'd assume it's very good.
Joe