Abbey Road Plugins

I noticed in the Snow Leopard/AU thread that the Abbey Road plugins were mentioned. How good are these, are they on par with the UAD1/2 ones. I haven't been able to find anyone who doesn't like them but are they actually the ones you reach for when you need a certain sound.
I more or less have the same plugins as Mark Cahill I can see from his passed/failed list, a lot of groupbuys I can see, so I wonder if you (Mark) use them or if they are out-performed by some of the others.
Of course I am interested in anyones opinion on this, it's just because Mark has the same plugins as I do so I would understand his references I figure.