I personally only like them for break shafts. They jump good too, but are a little heavy for that. When I used to sell the Purple Heart shaft blanks there were some people who liked to play with them. They were popular among some of my Canadian customers for a while and they were making playing shafts out of them as well as break shafts. When you go down to small diameters, they are not as whippy as maple. So my guess is they were using them in small diameter pool cue shafts or snooker cue shafts. They shoot most shots okay except for the draw shot and on that shot they are too weak on for me to like them for regular playing shafts.
The main reason I introduced Purple Heart as a breaking shaft was I saw Jimmy Mataya breaking with an Ebony shaft at the pro events I was working on cues at many years ago. His break was pretty powerful with it and it made me want to try it. So after I started pricing ebony in 30" pieces, I decided to experiment and find a different stiff hitting shaft wood that was not so expensive. Purple Heart was the one I settled in on and started selling the blanks. It was pretty rough on the tooling and I hate the dust, so after I went to the Saw machine for tapering I quit selling them as blanks.