Restaurant/Ambience: Medium sized, uber-modern café and lunch spot. Extremely well maintained. Well lit with lots of natural light. Decor is heavy on stainless steel and IKEA-ish feel. Typical patrons are from all ages but seem attract the Vegan-Vegetarian-Food Intolerance crowd.
Food: Great selection of hot/cold sandwhichs and salads, with most selections being Veggie/Vegan although they do offer some meats: tuna melt for example. The veggies used in the sandwich's and salads are some of the freshest I've had. They appear to source most of their food locally. Everything tastes extremely good and you can tell a lot time and expertise goes into the food.
Service: Everyone was extremely helpful, courteous, and respectful. Good vibes.
Price: Quit pricey. Most sandwich's are in the 9 to 10 dollar range. Portion sizes are on a appropriate scale for a health-conscientious person, but might be considered small for the price for others.
Overall: Restaurants geared toward the Vegan-Vegetarian-Food Intolerance crowd are becoming more common. Even if you don't find your self in the above categories you can appreciate the healthy/fresh/culinary-expertise factor in places like Oliver's. The only down side about Oliver's for me is the price. Phoenix has many other culinary-forward café's with better pricing.