So mom is doing pretty good. Thanks everyone for the great advice. The first night she wore it 4 hours, then 5 hours and last night for 9 hours! (including reading time). The report says she has a good mask fit, but she doesn't like the full mask either, @thankful, feeling claustrophobic like you mention. We'll soon compare apnea hypopnea index (AHI) scores from the early days to next week and the week after. But initial results are encouraging.