We went last November, after Thanksgiving. We were a group of 10, ages 4 thru 45.
It only took about 20-25 minutes to go thru, the longest time spent was on the "ice slides". Everyone but my sister and I went down the slides. The kids had a blast on that and we got some pretty good pictures. Other than that, you just walk thru looking at the sculptures. The best on for me, was the Manger scene. Almost life size, they had everyone there, even the sheep.

That was incredible. They all were.
But it is mainly an adult thing. It was my sisters Christmas gift to all of us so I didn't pay, but it was very expensive. And to top it off, they charged both of our cars a $7 parking fee!! I thought that was a little over the top. I mean, it's not a Disney park. I thought maybe they should credit you the parking fee with your ICE ticket stub, but whatever, we're on vacation.
We then went inside the hotel more and saw a very cute Christmas play. Our kids even got to be part of the show with the actors!! This was BY FAR the highlight of the night. We have it on video............priceless. I think it was done in the atrium of the hotel, and let me tell you. Everything was beautiful. Put every WDW resort's decorations to shame. IMO
We then did a little shopping in the shops nearby and my sister's family got a quick bite to eat.
I'm glad we did it, but it is definitely a one time thing for us, and we LOVE everything Christmas/winter. BUT, if you just want to go see the hotel and the show, it is worth the $7 parking fee. They even have a hot chocolate stand near the show.
The hotel is absolutely GORGEOUS!!! Beautiful, inside and out! I would LOVE to stay there one day.
Hope this helps. I'll be happy to answer any specific questions for you.