I've had good luck with them, though in my experience they're less consistent than the official S Pen -- when drawing one will register the stroke at lighter pressure than another, for example. And don't be shy about returning it if it isn't good enough.

I bought this one a couple of weeks ago and got a good one: https://www.amazon.com/gp/product/B09L4NF7HS

I ordered this one at the same time to hedge my bets, and got a dud. Either it was built wrong or its tip had been smashed, so it took a lot of pressure to register a tap. Back to Amazon it goes! https://www.amazon.com/gp/product/B09KPJTWJM

Anyway, that's the sort of inconsistency I'm talking about.