Any opinions on which of the two universal registries to use (myregistry.com or giftregistry360.com)?  
I am planning to use a universal registry for some misc. items not available at the stores with our traditional registries (Macy's and BBB).  I am not planning to link the traditional registries. Do either of them automatically update when a guest purchases an item from an external websites?  
Any experiences with either good or bad?
Thanks.
P.S.  I know Amazon offers a universal registry. Right now I am interested in feedback on the other two.  Thanks.