Any advice would be a great help
Leave the rose-tinted glasses at home and go in with your eyes open, expect to be overloaded with slinky Powerpoint presentations and slick salesmanship. Resist the temptation to be pushed into signing up for anything on the day (£20 discount for starting an application there and then?!), and don't lose your sense of perspective simply by being shown an A320 simulator. Take your time, consider your options and don't be fobbed off with nonsense when you ask important questions that require clear answers.
As ADC says, remember they are selling themselves to you - not the other way around.