Sorry bout the poor performance on both counts. (Seems odd doesnt it? What are the odds of you getting TWO lemons?)
Anyways, the wife and I ran our new Shield 45's for 2 days at the range with 500 total downrange. I had -0- failures. She had 2 FTL's but immediately called them on herself, not the gun. (she knows when she is getting weak at the end of a long session)
After 2 heavy days at the range with 3 Shields (I also had a 9) and appx 750 rds downrange, yea, we were tired
We are partial to Houge's. Have them on about everything we own including AR's etc. She will put a layer of 1/16 self stick padding on the grip first (walmart) and then have me put a Houge on over it. While I dont do that to my guns, I WILL admit its ccuuussshhhhy
Hope you have better luck