I went and bought a copy yesterday. It's only been a year since I last saw Beauty and the Beast but I loved every minute, it's such a gorgeous film and Disney at its very finest.
As for Blu-ray, on the one hand it looks amazing - real pin-sharp detail. I felt like I could hang every single frame of the film on the wall because I can see the canvas underneath. The problem though was that it looked TOO good. The problem with traditionally animated films being enhanced in high-definition is that you can see where there are shortfalls in some of the animation, and BatB is no exception.