I'm not really a fan of customer service games, but this one definitely has a lot of charm! I did notice that the confidence bar didn't appear sometimes, but don't know if that's just the case for me or for others as well.
Thank you for your comments. For confidence bar some customers has this "Honest" trait where you can't see their confidence and you simply need to do the math or just guess. We should explain more to the hero traits :D