> It was enough to get me to sleep with the mask on most nights, but I almost always pulled the mask off after 3-4 hours (or less) without even waking up. That

> It was enough to get me to sleep with the mask on most nights, but I almost always pulled the mask off after 3-4 hours (or less) without even waking up. That's pretty common, but you get used to wearing the mask longer and longer, it may take multiple weeks. Me and a lot of users on /r/CPAP will give you similar feedback. As for allergy congestion, have you tried Claritin, Flonase, others? May need to check with the doctor.