A classic! Ok, maybe not CLASSIC, but classic as far as short, easily accessible canyons go.
A competent group can do a quick run through of Blue Pool in less than an hour car-to-car, while an average group may take a little longer. Even though short, I highly recommend the canyon. It's easy access, leads to good narrows, and fun downclimbs or raps. It can have a few short pools, but is short enough a wetsuit is not needed.
As of 2011, all anchors are well done, and well positioned, making this a very beginner friendly canyon. All-in-all, I think this is a must do if passing through the Page area.