I cannot speak on the Warthog but I've owned a Para LDA for a year or so. 3" barrel. Nothing but good things, that's been my experience. I think the quality issues began after they moved from Canada to North Carolina. I'm not sure that they were quick enough to address these issues and they haven't gotten rid of the black eye yet. Mine was built in NC and its been great.
I asked this same question years back and most answers or suggestions were not to buy it. It seems that has changed, maybe quality has improved which is good since I like the looks and feel.