i went there before it was offically opened, (my gf's dad built the castles). been to all the disneylands around the world, would have to say this is the smallest one, even smaller than the one in paris. Didnt have to wait in line which was great. funny to see asian cinderellas.
As mentioned above for young kids, the buzzlightyear ride is fun. the lion king show was done really well.

the ride on the MTR there was a pleasent one, nice comfy seats, gets a lil windy when you're waiting for the transit.

Overall, good experiance, but if you're planning to go because of disney, would rather go to the one in Japan.