The problem isn't with the robes - it's with covering the entire face, except for the eyes (and in some cases, even those are screened).

This is my own opinion, but if someone were talking to me fully covered, I'd alternate between having a hard time taking the conversation seriously (and not thinking I was somehow dropped into a Scooby-Doo cartoon) to wondering what the speaker was hiding.

I respect the religion. I respect the choice women make (hoping that it really is them making it) to be covered, and if in a Muslim country that required it, I would do the same. But the full covering of the face just doesn't sit with me well.