Well just like with Disney, you pay a bit more for better service, better quality. (not a significant amount more, and there's some good deals too)
There's two on 192 now. One at 535/192 (which is good for epcot, dtd, magic kingdom), and the brand new one is on the far west end (good for animal kingdom, studios).
Kari just can't stand their milk. She prefers publix brand and is ok with wal-mart brand. I don't even drink milk, just for cereal, and I can notice a difference. Of course milk is processed locally, so it might not be the same everywhere.