I've been a member for a while now, and the only reason I still am is sheer laziness, as my daughters are 12 and 17, and we have almost every Disney movie ever made. I still get these a)because I'm usually too lazy to find and fill out the return card cancelling the movie (although I did do it for this month's Herbie: Fully Loaded, and b)because I still have a fantasy that one day all the movies we own will be in one place in my house, all neatly lined up, with each movie in its actual case, and I can take an inventory and see what else is in the catalog that we might ever want and buy it or them and THEN I will cancel.
Since I can clearly visualize some movies in the car, and a few upstairs in my daughter's room, and just last night we were looking for something that had become separated from its case, I'd say we'll be members for a while yet.
All kidding aside, it is nice to get the new releases this way, and it's not all that much more expensive than going to Target. If you love Disney movies and would get them anyway, and want the chance to shop from home, I'd say go for it!!!