Hi Endgame, I hope you have found some good success stories here. I know if you look up 5:2 on youtube you find some good stories and hints and tips too.
I have been going for two and a half months and it is working just wonderfully for me: not only losing weight, but feeling better generally. I am sure it will remain a way of life for me even when I am no longer losing weight.

The thing about will power and 5:2 is that you only need it for one day at a time. Have you thought about how you will manage your Fast Day? What you will eat and when?

Wishing you lots of luck!