We always pick somewhere fancy and a little pricey for Christmas Eve dinner, and we picked Tarbell's last year. As someone else mentioned, it isn't the most cozy place (read: romantic), but it was certainly nice. The only reason I didn't given it 5 stars is because we have gone other places that were even nicer, with outstanding service (Tarbell's service was great, just not impeccable which is what we were looking for that night).
The food was great. We ordered the mussels and expected a bowl with a dozen in them to share- NOPE! We EACH had a dozen mussels...almost unable to eat them all and dinner!
The place was busy, mostly an older quieter crowd which was nice, until a trio of young Scottsdale-ians walked in. Boo.
Valet was super easy, food was great. Would go back for a nice dinner, just not for our nice Christmas Eve dinner.