In the past I have loved the Activa. It works well as far as seals go, but I have gotten so tired of having all the bulk and weight of it on my face, so switched to the mirage micro. I like that one as well, and it is much smaller on my face. Just recently though I have begun having lots of leak issues with that one...I think it is just that the mask cushion is worn out. yesterday I got a new mask...a good ole' comfortgel. My very first mask was a comfortgel, and while I didn't not like it, I was on the search for the elusive perfect mask. I have been fortunate in that I have been able to make almost any mask I have used work for me as far as leaks go, there were just some that were more perfect than others. I like that I can use a variety of masks, so if one starts to feel uncmfortable, I can switch out for a while to a different mask.
Cindy