I tried nasal pillows for the first 3 nights on APAP but couldn't get it to work for me, felt like I wasn't getting enough air and had very sore nostrils and struggled to keep it on all night so I got switched to a FFM. I regularly get up to a pressure of 17 or 18 and was struggling with leaks with the FFM, I think from the pressure fluctuations during the night so it decided to try pillows again and ordered a P10 with my new AutoSet.
A larger cushion size, a higher minimum pressure, a little smear of lansinoh on the nostrils and having the headgear a little lower on the back of my head so it holds the pillows in place without the upwards pressure and I think I'm there! It took some persistence as each of these tweaks were done one at a time, I'd try one thing and it would seem ok at the start of the night and an improvement on past tries but would end up switching back to the FFM after an hour or 2. Last night slept 8.5 hours, an AHI under 1, no wake ups, no switching out masks and full of energy during the day.
If it weren't for the advice here I never would have thought to try all these adjustments and it challenged my assumption that I was destined to use a FFM forever so again to each and all for sharing your experience and advice.