Like every species of fish used in ponds HSB are a tool to be used to get to your pond goals. Like all tools no fish species is right for all occasions. Check out these 2 prior threads on HSB. The first has a link to a very detailed study of HSB in N. C. ponds the second is George's composite thread on HSB with links to tons of info from people with experience with them in ponds.

http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=5;t=000450 N. C. State HSB study plus comments

http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic&f=20&t=003579 George's composite HSB thread with links