I used to own one. I have an entry in my logbook which reads "7900' at sunset, 35 minutes climb", which was an average of just over 210 fpm given the field elevation.
I loved flying the thing. Thought myself how to fly a tail dragger in it (this was before JAR, so the brave and stupid could just go and fly one). I did 13 T&Gs down a 1800 meter runway once.
If there is anybody in East Anglia who has got one and is prepared to let me have a go, please send me a pm.