I like that it gives every YA and older a +40 moodlet for being on the lot and you can set it so that they'll always be in their normal clothes (or formal, or swimwear, or the masquerade and togas). The downside of this is that sometimes it'll change the traits of sims on the lot to Inappropriate and Party Animal. The traits go back to normal when you turn it off though. Expect to see lots of forum trolling and autonomous stereo dancing if you leave it on too long.