I received and assembled the N30 mask and headgear. I'd like to offer the following feedback:
1. I find it amazing that a person can spend more than $100 and receive a product with absolutely no included instructions.
2. The design for attaching the R and L headgear straps is incredibly poorly designed; leaving the headgear strap prone to spontaneously separating from the nasal cradle during sleep.
When assembled the mask is super comfortable and unobtrusive - but, if it comes apart it is of no use. I strongly suggest that you should avoid recommending it to any and all Customers.