I'd been building this a while, but last week was the first time I used it on actual client work instead of a test. Handed off a landing page, and the client dropped 20 pins on the live page. I cleared 16 of them through Codex in about 10 minutes. Their words, unprompted, right after pinning: "the pin thing was excellent. i mean that was just so easy."
Two things I didn't expect: how fast the agent side went once the pins had real context attached, and how much the no-signup part mattered to the client. That second one is the whole reason people actually leave feedback.
If you do client or beta handoffs, give it a go. I'm honestly curious how feedback moves through your workflow right now, and whether PinDrop could tighten that loop for you.