I was at the same day as you today!
I probably shouldnt describe myself on a forum though!
I thought my interview went really well, I was dreading forgetting something really simple! Mine was based on aromatic compounds, firstly benzene, but then he went on and asked questions about a whole load of other ones Ive never seen before! It wasnt that bad though, it was more like a mini-tutorial than an interview.
Did you get an offer/what offer?