The seating seems to be zoned based on sound level. My group was seated near the back of the restaurant which is considerably more spacious and quiet, so it was easier to chat. Near the front of the restaurant seems to be more rowdy and energetic, and the seating in front of the open kitchen/bar is great too if you want to see the cooks in action.
No one in my group had been to Valdez before, so we went with most of the helpful suggestions of our server. We ordered the mo-tio litre cocktail, tiradito ceviche, matambre, maduro, and chaufa. For dessert, we shared arroz con coco, and helado de coco. The tiradito ceviche was very interesting because it was salty and sweet at the same time. The matambre was standard fare, nice and pink on the inside. You can skip the maduro, it wasn't anything to write home about. What you need to get for sure though is the chaufa, because it was an explosion in flavour and aroma. Both desserts were a nice cool down to balance the spiciness of the mains.
Overall, service is excellent, and the food choices and quality was quite good. Some dishes are a bit expensive, resulting in lower value than ideal, but I guess that's to be expected on King Street. There's also a tasting menu and a rooftop patio that I would like to try in the summer.