I have owned 3, an SAG, LOA and a PTF II. They really are something special. The workmanship on all three were top class and I loved every one of them. I eventually sold the SAG as it was too short for my draw length and I also sold the LOA as I needed to fund the purchase of another bow. However I still have the PTF II.
I have shot a few but never owned the 3PC bows, I'm not a fan of the larger riser, just too much weight for me.
Are they worth the extra, for me they, but thats really build quality and style, I'm not sure they shoot much better than other bows around.