I have been flying to PHX for 11 years now and since almost all of those flights have been on United, that means Terminal 2. While it is much smaller than the main terminal and therefore doesn't offer all of the dining and shopping amenities, I still like it. Going through TSA has always been easy. Check in and baggage retrieval has been good too. The United gates can get a little crowded when 2 flights are leaving at the same time but it all works out.