Questions for Photographers

I know a lot of you have already booked photographers, so I was wondering if you have any suggestions about questions to ask them when meeting with them. We have our first two photographer meetings next week and are hoping to choose between one of them. I know when I met with venues I had a whole bunch of questions to ask but not really sure about what to ask photographers.

Also did you try to negotiate pricing for their packages? Did any of you get them to decrease the price a little bit or throw in something extra? I'm all about negotiating to get the most for my money, so I'm planning on trying for something.