I have spun Bulldogs, Grobs and Fireflies, and all were benign though all had some aerodynamic anti-spin devices, due to poor characteristics of the basic design (Bulldog has spin strakes and a ventral fin, for example). However all were planned recovery by 3000 feet or leave the aircraft by the convenient exit formed by operation of the canopy release. When I have my instructor rating and when cleared I will spin, but not at the heights used by some civvy instructors.
Remember folks, check for fuel balance - even a C-152 will bite you if you spin towards the full wing when it's been feeding from the other! Was the subject of a "learnt about flying from that" I came across. Keep it within 3 gallons.