1st and 2nd round interviews with the client company were done via email. However, my contact changed without warning, multiple times in the process.
I was told on a Wednesday that my second round interview with the client would be on a Friday, but was not given a time until Friday mid-morning, and it was via forward from another agency. Since questioning this, I have been treated differently. I was made an offer by the end client, but have chosen not to accpet.