We have only been once at DLRP during 15th birthday celebration, but it was the best visit to DLRP ever.
DLRP did a very good job to celebrate the 15th birthday. The parks looked really great, especially DLP with the Main Street Banners and the Castle Decoration.
A new parade and new attractions made Disneylands birthday something special, too.
Hopefully Disney will do such a great celebration for the 20th birthday again.