Had to take the greyhound from LA to Phoenix, and was pretty unhappy with both stations to be honest, this one in particular was just really dirty, and getting help or info about your bus was all but impossible, which is ironic because there really aren't that many people at the station looking to get help or waiting to talk to staff. It just seems like everyone is doing the bare minimum to get their jobs done and no one really cares about you or helping you.
I guess on the bright side, there's a food stand/somewhere you can buy some food if you need it.