If the person says "Sí":
* "¡Qué bueno!" (That's great!)
* "A mí también." (Me too.)
* "¿Por qué?" (Why?)
* "¿Qué te gusta más de la clase?" (What do you like most about the class?)
If the person says "No":
* "¡Qué pena!" (That's a shame!)
* "¿Por qué no?" (Why not?)
* "¿Qué es lo que no te gusta?" (What don't you like about it?)
* "Yo sí la disfruto mucho." (I enjoy it a lot.)
If the person is unsure:
* "¿Y a ti?" (And you?)
* "¿Qué te parece?" (What do you think?)
* "Yo la encuentro muy interesante." (I find it very interesting.)
You could also simply reply with:
* "Sí, es muy divertido." (Yes, it's very fun.)
* "No, es un poco difícil." (No, it's a little difficult.)
Remember to adjust your response to the situation and the person you are talking to.