Spiral dive recovery is specifically demonstrated in the Bonanza Pilot Proficiency Program. In good VMC nobody will have any problem with it, but a pilot trained on say a 172 who gets his hands on a Bonanza in IMC may have more than he wanted unless trained for it.
Here is some serious reading:
Angle of Attack Stability, Trim, and Spiral Dives [Ch. 6 of See How It Flies]
At the first PPLIR meeting in Kortrijk (1997?) I gave a paper on Spiral Dive Recovery and anyone who was present will remember it, I even got email messages from enthousiastic members who tried it on the way home.
Of the dozen airplanes I'm checked out in, including the Super Decathlon, not one of them will not enter a spiral dive if left alone, never was checked out in any Cessna however.