Good wifi that is free! That alone is 3 stars automatically. I have been to many airports that charge for crap wifi.
Layout is not the best If you want to go terminal to terminal. You must step out and find the bus, which needs to be improved upon. Sometimes they are by the curb next to the exits, but some pickup areas are in the middle of the busy airport street. You have to dodge cars and people that are loading or unloading. If you are in a rush between flights this can pose a problem. I have seen people running crazily through traffic trying to catch the bus. This airport would be great with some sort of monorail that takes you from each terminal. But if you are getting from the parking area to your gate or vice versa, then the layout is actually user friendly and efficient.
Once you go through the securtiy gates, their is not much for food or store browsing options. So get your fix before you enter.