I've done this ride the last two weeks and it is a blast!  The pace is fast, just what I need to move up to the next level.  Yeah, I get dropped now and then, but I work much harder than if I was riding alone.  Phil also offers lots of advice and tips during the ride.  So far there are three loops--all with a mix of fast straights and some moderate climbs.  My only advice is bring something a little warmer, as the wind off the ocean can drop the temp 5-10 degrees compared to inland.