I ate here on 9/17/13. I was in Santiago on business and we decided to go to Pedro's based on the tripadvisor reviews. Great advice all around, the food here was fantastic and such a nice looking restaurant, the pictures don't do it justice. There was some sort of event going on the night we went, but I was fine with that because they had live music for it!
The service here is really nice, much more like what we're used in the US (where the waiter comes and checks on you a few times during the meal) but the prices are more expensive than what you would find in most Santiago restaurants. For three people we spent about USD$170 but that included two bottles of wine and dessert.
Overall, totally worth checking out. Next time I'm in town, I'll be going back for sure.