I'm using it. My showers's next weekend so it's hard to say how well it's working... I think if I was going to do it all over again I probably would have stuck to Amazon's registry which allows you to also pull from other sites (though I went to babylist because I'm that person who wanted to buy from the random site but didn't always have the recipients address, which is a feature I like about babylist.) So far what I've noticed the biggest problem to be is that when you receive a gift via ups, there's nothing on the packaging that say who the sender is. So you have to go to babylist to see who sent it. If you were just using amazon registry, I think it puts a gift note or something??? I'm also concerned about duplicates, because the person has to reserve an item, then buy it - it's not an automatic update when an item is purchased.
As to the oldies... well so far no one over 50 has gotten anything off the registry that I can tell. It does confuse the sh!t out of my mother, who I think of as mildly tech savy.