Unbound as DNS resolver on a Linux laptop: tips/experiences?

[Edit: this question came out of my confusion. I thought Unbound could somehow substitute DNS servers (like CloudFlare), but it can't. Apologies for my ignorance.]

I've often heard about Unbound, and the possibility of using it as a DNS resolver on my laptop. So, to be clear, not as a DNS resolver in a local network; just in a single machine, also because I'd like to use it no matter where I bring my laptop.

The instructions given in the second link above seem quite complete. Does anyone here have other tips or experiences to share? I'm with Ubuntu on a Thinkpad.

Cheers!