She was fantastic. She put 1000% into every performance, even when just reacting and listening. So much energy and devotion to the role. Just watch her put "real" actors to shame in the Pufnstuf movie. The "star" witches were just bland compared to her. Yes, it's hightened "children's theater" kind of comedic acting, but it takes just as much skill to do well. Maybe more. Even coming back years later do to the (mostly terrible) Paul Lynde Halloween Special as Witchiepoo, she gave it her all.
They used to run HR PufnStuf late-night/early mornings here on TV (one of the affiliate channels or the local channels, I can't remember) during my time in college and when I was up late, whether I couldn't sleep or was "on something," this show would freak me the hell out. It was a very fun time.