Yes had personally seen those coralline encrusted live rocks. Good quality, big pieces (hard to find these days) and some even got nice yumas attached on them!
All those who want good quality live rocks should grab this chance.
I have been using a 0.5hp pac coo chiller running on R22 for my 5ft tank for almost 2 years with not a single problem. I must say i'm a satisfied customer and derek provides great after sales service as well.