Looking for the best Green Screen Fabric

You are correct and you are wrong. Full length models on green screen are problematic. But then you use white or grey and cut a path. Auto programs are marginal. FYI new green screen extraction has effectively address the green contamination, thus the comment about knowing how to properly use green screen. Still a much better extraction technique than the magic wand/auto programs.

But then you would have to do this on a regular basis to understand the difference.