I'm glad folks are liking this. I was definitely quite disappointed; the scale of the lights isn't really enough to hold your attention from a car (whereas in person they are certainly more impressive), and as has been mentioned, I went on a crowded night and it was handled in the typical inept SF fashion; we waited nearly two hours to begin, with no communication or explanation at all.
One smaller pet peeve -- and I recognize this is asking for more, but for what it's worth -- is that as we were crawling by the actors, they would all try to talk to us, but it was never in character, just like, Central Jersey teenagers kind of generically wishing you happy holidays. I don't expect Disney quality, but it would be nice if the "Poinsetta Princess" or whatever behaved at least a little bit like a princess.
All that said, it was cool driving through the park, but I certainly never need to do it again.