Good. But I wish PostmarketOS supported more devices. On battery, tons of kernel patches could be set per device plus a config package in order to achieve the best settings. On software and security...you will find more malware in Play Store than the repos from PmOS/Alpine. I know it's not a 100% libre (FSF) system, but that's a much greater step towards freedom than Android, where you don't even own your device.

The issue with Linux-based phones is and remains apps. Waydroid works pretty well, but since you need to rely on it so much, you are better off using Graphene or Lineage in the first place.