The doctor recommended this mask: FlexiFit HC431 Full Face Mask
And it is working very well. It is easier to fit than any ask I've ever had, it doesn't leak and it is comfortable.
I woke up this morning wanting to sleep longer. Sometimes I wake up tired, and have trouble waking up. And while I've been short sleep lately, I just wanted to sleep. You won't understand unless you have sleep problems....
And yes, it's worth $150.00 to be able to sleep.