FWIW, I just got an Opus 360 after have the Swift I/II for two years. Overall, I like it with some reservations. It is a lot better for side sleep, which is why I got it. I really like the 360 degree side swivel on the nose piece. That is a real innovation, IMHO. I also think I am getting a better seal.
On the downside, the headgear is just slightly less comfortable for me than the Swift, but I have ordered some pad-a-cheek pads to fix that. Also, the configuration takes some getting used to. I keep wanting to put it on backwards! In addition, it is a little harder on the nares, but not too bad and again, I think I will adjust. Overall, I like it better.

