Yes, I still sail and enjoy the old 5.2. I can take any Dart 18 I ever saw on the water, except in survival conditions when they are sailing two-up and I'm solo. One might yet beat me then... A Hoby 16 two-up with spinn can still whop my a$$ though.
Darts are simple and effective boats though, easy to handle and store. I almost traded my boat in for one with great sails. There's a neat trailer design they tend to use around here where you can break the boat down and it'll be a small package behind the car (probably around 6ft/1.8m wide). Great for towing long distances or through smallish European streets (You know, the Charles Dickens kind).