Honestly if I'm just following what a single LLM is doing I'm arguably slower than doing it myself so I'd say that approach isn't very useful for me.

I prefer to review plan (this is more to flush out my assumptions about where something fits in the codebase and verify I communicated my intent correctly).

I'll loosely monitor the process if it's a longer one - then I review the artifacts. This way I can be doing 2/3 things in parallel, using other agents or doing meetings/prod investigation/making coffee/etc.