Yes I used it. The optimized prompt was not better for my use case. The playground was useful though. I believe prompt optimization is really only optimized by

Yes I used it. The optimized prompt was not better for my use case. The playground was useful though. I believe prompt optimization is really only optimized by running it through many scenarios and understanding how changing a single word affects things down the line. And then a bunch of hardcoded conditions to change the system/assistant messages on demand as an output of the tool.