My family visited Blu Berger while in Phoenix. We have a variety of food allergies (gluten, dairy, nuts). The servers were very knowledgeable about their menu and how the kitchen made and handled specific food and how they might be contaminated. The owner came over multiple times to make sure our food was made without any cross contamination. We all got burgers and they were some of the best we have had!! Would highly recommend Blu Burger for their staff, food, and attention to detail!!