I have my business mail box here. The price for a mailbox is average, but the service and willingness for the employees to help are WAY above average.
The mail part of the store has 24 hour access (They give you a key). Making it really convenient to pick up the mail on my time. They accept mail and packages from ALL carriers (make sure you fill out the right paperwork so they can sign for your packages). You can only pick up your packages during business hours, but they can send you a text or email if you get a package -- so you always know when you have one. Lastly, you call call and have them check if you do even have mail before making the trip.... saving you time.
A little tip - I even have a few of my personal (non-business) packages delivered here. Living in Phoenix during the summer months, it gets HOT. Having my packages (esp if food, wine, etc) delivered here allows them to be a little more temperature controlled...rather than sitting on my hot porch all day!