What do you mean by pleasant? Is this primarily something for Android users?

Some things I've not seen others mention: you can subscribe to channels, create playlists etc, all without needing a Google account

I think it's only for mobile, and you can only get it by side-loading as far as I know.

If you have a $100 phone then UI is lighter as compared to running firefox etc.

Leaner. No ads in layout. Better organized. Not cluttered by buttons nobody asked for.

It's a native Android app vs. a bloated multi MB web page. Of course NewPipe and PipePipe are better. :)