Are Osteria's other restaurants as good as O. is?
The original restaurant of the group is Vetri, but they only offer a $135pp prix fixe. If you are good with that, it's worth a visit, but a totally different experience than Osteria. The other restaurant is Amis, the menu is different, but if you like Osteria it's worth a try though it's hard to beat the pizza and pasta dishes at O. Price point is similar.