Firstly, i am really sorry that you didnt get through. I'm going to sound like your mum, but i think anyone who has dreamt of becoming cabin crew would agree that resilience and an ability to keep trying are key.
Good to hear someone who has positive things to say about their interview experience. I am a huge advocate of Silverjet and find that its the minority rather than the majority that write negatively on this forum.
Of course everyone is entitled to their opinion, just good to see that you made the decision to find out for yourself.
Good luck in fulfilling your dream.
