Great boat, but as Barquito points out, they can be difficult to right. My wife's family has had a '69 DSI up on the St. Lawrence river since the early 70's. Just about everyone in the family has learned on it over the past 40 years and that boat's still going strong.
Parts are cheap and readily available:
DR Marine Category List
Decent forum for support and classifieds:
DaySailer.org • Index page