I take out these beauties a few times a year, and not just for gaper/closing day fests. 1984 Vintage Dynastar Course SL with goof old 747 equipes.
The skis are 185's, which happens to be the shortest ski in my quiver. Other skis are 185, 189, 196.
They have by far the best edge hold of any ski I own.
To actually carve them requires really committing to it to get the ski to bend- most straight skis are world's stiffer than modern skis. I can manage some pretty clean mid radius, but that is it.
The biggest problem with skiing them is that there is no middle ground- either you are working hard to flex the ski, or you are making pivot skid turns while actively minimizing the amount of edge engagement to keep the ski from grabbing. Whenever the ski gets rolled on edge without a solid forward flex, you just get locked into a 70m turn- usually at really awkward times.
The biggest thing keeping me from skiing them more? It ruins my skiing ability on modern skis. I switch off these to modern skis after a few hours and I can't find the edge- because of all the time I've spent on straight skis reducing the amount of tip so I don't lock the ski in when I don't want that outcome. It then takes a few hours to get it back.
A good straight ski is a good ski. I love the Dynastars because they are damp, controllable, and hold on to anything. They don't feel like more work in recreational skiing, but you don't get to carve without really working at it.