I haven't bought it since my membership ran out, but I intend to re-join soon because I'm sick of paying $40/gallon for oil locally.
As for it's quality, I ran my first gallon of APV oil through my 02 ZL SS when it was new and since then the sled has seen nothing except amsoil. The powervalves finally got stuck at around 2,000 miles. That's good enough for me! I just bought a new crossfire and it'll be getting amsoil from day one.