TL;DR: Copilot Workspace is a great concept. But the UX and framing is entirely wrong and sets the wrong expectation for users. The current prototype is very slow (5+ minutes for one-line code changes) and the generated code is often buggy or has nothing to do with the specification. It doesn’t help me understand the code. The generated plan is usually good. ChatGPT does a much better job in my head-to-head comparisons (assuming I already know exactly what code is relevant). I'm still optimistic of where it can go from here.
I recommend everyone sign up to try it and give the team feedback.