This is a poll to find out the general concensus on the effectiveness of our Sandbox for Proposed Challenges.
To participate, up-vote exactly one of the answers below. There are only "Yes" and "No" answers. There is intentionally no "Maybe" answer, choose "Yes" or "No" as best you can.
By "effective" I mean that the Sandbox does what it's supposed to and provides a place where users can test out their challenges and get consistent, constructive feedback. Feedback that, if followed, will keep their question from being closed when posted, and will fix any potentially confusing parts. (To me, this is the minimum of what the feedback should do. Making the challenge more interesting and up-vote worthy is a step above this.)
You may think the Sandbox is effective and yet think that it could be much improved.
You may think the Sandbox is not effective, and yet think that we have no better way to do it.
Answer this poll with regard to your personal opinion on the general effectiveness of the Sandbox as it stands now. This is not a poll asking whether or not we should change the Sandbox in any way, this is just a gauge for what the general feeling is.
Motivation: I'm asking this because I've always been skeptical about the Sandbox. Many of the sandboxed challenges (there are nearly 900, though of course only a few are still active) have little or no feedback, which may discourage users from ever posting them. I've used the Sandbox 5-10 times but have had plenty of success not bothering with it at all, even at the very start of my PPCG days. I realize I'm an exceptional case, which is why I'm not participating in the poll, but I'm interested in what everyone else thinks.