works great for me, faster boot. PVR channel and EPG load times and more snappy in general. i have 3gb video DB in Maria, and changing to SSD had a massive positive impact on kodi search. i just flashed the SSD same as i would an SD on my PC. i had to uppdate petit boot to get it working. i have SSD on on 3 N2 (was 4 until the usb ports died on one of the boxes)
i found best performance using the top USB port closest to the HDMI (the other ports i got occasional freezing requirung power cycle, but rock solid on the top port closest to HDMI)
i scheduled fstrim --all to run each night in cron after my library updates to keep performace at its best (so the internet told me anyhow)