Its just amazing. It made my experience of YT Music million times better. The only reason I used Spotify was its aesthetics and now i get that in YT music so its a win win for me to switch to YT as I get ad free music with ad free youtube. Its just amazing.
Better Lyrics is a huge improvement to YouTube Music especially with the Fullscreen mode. Just try it, try to mess with the options and find yourself your best configuration.
Enjoy 👍