If your LDL has seen several returns, I'm sure they are being honest. I can only relate to my personal experience-- I've used my 3mil Gold Core Full for my most recent 55 Caribbean dives, with no seam problems yet. Of course, all this means is that, so far, the score is: 2 AGAINST ( Your LDS and 'Leg Split Woman'), and 1 FOR (me). Hopefully, you will get some more opinions!