I flew both SUD and SZY (we called them quite obviously Sud and Suzy) during my cadetship in 91/92. They were a great trainer for both Tailwheel and aeros. Easy to fly, gentler on technique than the Super Decathlon which I'd done my initial Tailwheel endorsement on, and good power to weight for aeros.
The thing I liked most was the Spitfire like wing iron them. Always pretty.
My most enjoyable flight ever was doing 0.9 of aeros with 'Dog' Seager. Geez I was buggered after that.