The Simplus is a very comfortable mask with a deep, soft seal. I can see it being a "go to" mask for a lot of people who don't need supplemental oxygen as part of their therapy.
In my case, the soft seal and the shape of my face generally do quite well...but for at the chin. I noticed in the transition between inhalation and exhalation...that little time when you've stopped breathing in and the machine is still trying to keep up pressure as if you were, you know, that spot where you get that little extra pressure spike...that's where the Simplus' soft seal leaks at the chin for me.
It might not be a concern for others, but in my case, go fort was a toss up between this and another mask. The other had a slightly stiffer seal at the chin and doesn't leak for me...which gave it a slight edge over the Simplus for me.
As in all things, your face and mine are different, so YMMV...the Simplus is a very good mask and if it works well for you, you'll love it.