My family recently took a dive on the Vandenberg and had a great time. We used Lost Reef Adventures and had a fabulous experience. The dive crew was awesome and shared a lot of helpful information about the VB dive site.
The dive itself had both good and bad points. The vis was limited on our first dive (10-15 feet) and improved but not great on our second (15-20 feet). The ship is enormous and for slower than average divers, it could take a dozen dives to see the whole thing safely. For divers who love photography, even with the limited vis outside the ship, there are several neat places within the ship that provide excellent photo opportunities.
I am definitely looking forward to a return trip but maybe later in the spring or summer to catch better conditions. I am amazed that someone had a 100+ feet of vis during December this year. However, I hope to return at a time that I can have a similar experience.