I've written a review of KDE neon 5.15, an Ubuntu-based distribution with the latest Plasma desktop environment build, tested on a laptop with UEFI, GPT, 16 partitions, and a multi-boot Windows and Linux setup, with both User Edition and Developer Edition tests, covering live session, in-vivo upgrade and use, including look & feel, networking - Wireless, Bluetooth, Samba sharing, printing, multimedia - MP3 playback and HD video, smartphone support - Moto G6 and BQ Aquaris Android devices and many associated errors, KDE Connect, performance, battery life, various problems and regressions, other observations, and more. Enjoy.