I've never owned a PT709, but can attest I had zero FTF failures with my PT111 over the years I've owned and shot it. I did have a problem with GDHP stuff once - with one 10-rd mag, (Taurus supplied two to Ruger's single mag; spares cost you extra) but they replaced it with a phone call (Mec-Gar makes the magazines for the PT and LC9 gunsafterall).
Experience maters though - hearsay doesn't. I cannot say how the new LC9 performs but give it ten years to catch up with the Taurus design. Maybe less as Ruger is indeed getting better at reverse-engineering others' proven designs.
- That's not a slam, I own several.
I have an LC9 which so far has performed flawlessly. I owned a Taurus PT111 which I traded for my SR9c when it started doing light strikes. I also owned a PT709 - after four trips to the factory for warranty repairs (FTE's, FTF's, light strikes, dropped mags and a broker guide rod) I gave up and sold it for a loss. I know other folks have had better experiences, but I just got fed up and lost patience (and confidence as a carry gun).
I forgot, I still own a Taurus 605 snubbie - works fine now but it took three trips to the factory to refit the cylinder so it wouldn't bind. Their lifetime warranty just doesn't mean much to me with that level of quality control.