It's pretty trivial to set up, here's a link to the docs: https://x402.gitbook.io/x402

Transactions confirm every 2 seconds on Base, and preconfirm even faster (every 200ms); there's no lag from a peer to peer payments perspective since they settle so quickly.

Through account abstraction and spend permissions, you also don't have to wait and authorize every single payment. It's a customizable from a developer perspective depending on how they want to build out their application.