This is the newest terminal for McCarran (LAS) and it shows. I usual fly United in and out of this terminal and never appreciated it - until I had to use Delta once at the other terminal. This is especially true when there are multiple conventions in town. The security line at T3 is long but pretty efficient. The pre-check line has 2 TSA persons. The regular line moves quickly too with multiple checkpoints. There is no separate line for Premier people (but there is a separate line for 1st class). There are a lot of tables in different locations with good selections of restaurants and stores. Airport is not a place to enjoy oneself but this one minimize your pains.