I've done two:
1. The Swarm: Disappointed with it at first, but gradually, it has grown on me over the last few years. It is a little too short, but its a very fun and re-rideable coaster. I swear it's getting more forceful as well. 8/10
2. Raptor: I initially preferred this to Swarm, but as I have started to like Swarm more and more, this has fallen behind. However, if this too has gotten more forceful over the past few years since I rode it, I may change my mind when I ride it again. 7.5/10
I doubt it's a ride type that I'll ever find to be amazing, but from the two I've ridden, it's a very enjoyable experience, providing you know to expect a more floaty than forceful type of coaster.
I should be riding Flug der Dämonen later this year. I'm interested to compare it to the two above because from what I've seen and what I've heard, I'm not sure if I'll like it as much.