The Luger trigger is, at best, poor. I don't know about the current ones, but the whole system does not lend itself to producing a really good pull, no matter what is done.
Again, I don't know about the current Texas crop, but I have never had a Luger I felt I could fully trust in the defense role. The only one I have had that was fairly reliable was a 7.65mm "1920 Commercial". Most 9mm's are iffy even with proper ammo.
I know some will have other experiences or say that the guns were OK in German service. But I have fired Lugers that were almost brand new, with matching magazines and German service ammo, and have had jams. So I will stick with saying that as collector items (original guns) or novelties (new ones), they are fine, and I recommend them. But for a defense gun, buy something else.
Jim