If it makes you feel any better, I've read that most people require 4-5 different masks before they find one that works well for them. Usually there's a 30 day trial period on each mask so if it's leaking or not working for your sleep position, take them up on your free replacement mask.

Not sure how your AHI is but I need to be under 3 (and no leaks) to feel "great". Some people can self titrate to 0, but I'm not one of those lucky ones. Best I've ever hit was 2.0, but it was like night and day from my usual 4-5.

Good luck!