I have several full face masks and they all seen to have their little issues. I like this Hybrid (vs the Liberty that looks much like this mask , but has no chin support). The chin support seems to be quite important in the overall comfort and support of this mask. One message I would like to pass on to Innomed and that is "less is more". Far too many accessories come with this mask set up. It's a bit overwhelming when you open the big box. They really include 100 ways and sizes to fit this mask. This must have cost them a fortune, as I've never seen another company include so many sizes in a set up. I took two nights trying everything on. I finally ended up with medium and medium. So far I would say the mask has been very successful. It is well thought out mask system and actually very comfortable.