I use the free versions at present. But it's sufficiently useful that I would consider paying. It's already chosen a car radio and adapter for me - a choice that would have taken me hours or days of research.

It's also brilliant at summarizing posts. For example, when "Burning Bright" posts one of his typical essays full of "ourabouros", "hegemonic", bicameral" nonsense, AI can instantly sum it up in a couple of understandable sentences for me.