Dec Specials are slightly better to shoot than J frames but only slightly. In production for a long time, there are a number of variations out there. I've owned a few over the years. It's a popular model, finding a good deal is not easy. The Cobra (alloy frame) generally goes for a bit less.
I've owned both old and new style. Strictly from a cosmetic point, I prefer the later, shrouded barrel models. Functionally there is no difference. One caution; during the Colt strike era, a lot of guns left the factory with sharp edges, very sharp. I had a DS that would draw blood. When examining one the sharp edges are pretty obvious.
Can be surprisingly accurate things, more so than most J frames. The steel frame versions are generally considered safe for plus p, the alloy guns not so much.