Bettylen is quite pretty. It hasn't been exactly a crazy performer. Not bad but not crazy. This was its third summer in the ground for me and it did have a long season, starting June 26 ( Early) to August 13 ( mid Late). It didn't bloom every day however, producing 23 flowers over the course of a little under two months. Very rarely there were two flowers on the plant at the same time and only once were there three.
It's relatively short at 22", which is about what my plant reaches. So I guess I would recommend Bettylen for a smaller garden space, where you don't want a Daylily that's going to take over. It's not a fast increaser, at least so far. But the flowers are very pretty!