I´ve had an activator in my orthodontic treatment phase and it feels very unconfortable for me at this time. I´ve not often wear it, because I hate the feeling of a mouthful of plastik and the fact of the big speaking habit I have with it. But that was before my interest of braces.
Now I wear a big activator, that gave me that big speaking habit, that I now like very much. The headgear for the activator makes it complete for me