If the self check out is configured to trust you, it is faster. Each store seems to implement this differently. It's good that you shop at a store that lets you do this yourself. There's one grocery store near me where I have to wait for an attendant to confirm each item because it doesn't like the weight of it, or I scanned it too fast, or something. That one is very much noticeably slower. I avoid shopping there.

The trust is the key. If we are trusted, Home Depot should not be secretly keeping tabs on us...