The Lights of Winter is my favorite Holiday offering at EPCOT. The archway is extremely beautiful creating an awesome colorful walkway toward the tree and into World Showcase. I also love how the Monorail passes right through them, it adds a little something extra when that happens. This is a must see offering if you go to EPCOT during the Holiday season!
We have scheduled our WDW visits for the period just before Christmas for our last three trips and such passive attractions as this one is one of the reasons we prefer to go at that time of year. It adds greatly to the Christmas decorations in Epcot.