This is the best music store in Phoenix. They have a great selection of sheet music and the staff is super friendly and helpful. If they don't have a piece you need, they will find it online and print it for you. They go the extra mile and do things like make sure it's in the key you need.
They are super knowledgeable and make sure you have all the information you need related to your purchase. I was in there yesterday to get a choir performance binder and a piece of sheet music. While one clerk (who I think is the owner) was finding my music online, the other clerk was taking the time to talk with a father and son (probably 8-10 years old) about the son's first violin and the proper way to care for the bow. He was patient and thorough with them - excellent customer service.