Hasn't had any issues that weren't rectified within a day for me. It has sorta yt-dlp functionality integrated with any source (so exporting your playlist to a local backup is a breeze).
Since the community can add their own sources, it's relatively easy to find one if the one you want isn't on the official support list. You also can use the client on any non-apple device so that's cool. (Even has local sync which is sick)
As for the IP stuff, it usually only stops playback if YT flags you as a bot (since the client doesn't send the telemetry data back to google that would normally validate your "humanity"), but something as simple as a VPN location/address change is enough to keep on watching (and the original address will work again within an hour).
I share the same feeling in my bones.