I recently went to Aji for my birthday. The food is great, the wait staff was friendly. My server advised us on recent changes to the menu and was upfront about her limited knowledge on the newly added items. We arrived during happy hour (3pm-6pm every night!) and took advantage of some of the drinks on special and the ceviche. Everything served was perfectly portioned and they took great care in presentation. Our dinner was not rushed but we never felt that we were twiddling our thumbs waiting for food. I suggest the homemade churros with hot coffee vanilla and peanut dipping sauce for dessert on a cold night. This dessert alone is worth a drive into Boulder. Overall we had a great time at this restaurant and enjoyed spending a little more money than normal on a special night out.