It's a huge improvement and has motivated me to finally start exploring my legacy Play libraries again. Even though the overall visual changes are subtle, it's easier on the eyes, quicker to navigate, and MUCH faster to load, so that I don't lose my train of thought or my listening context when comparing stuff. I do feel for those who paid for it before it was free though. I certainly paid top dollar for Spaces 2 (and even Spaces 1). But I don't think that's free yet.