Cohort 8 here!
One of the best experiences of my life. All of the residentials were very informative - and the US week was phenomenal. I'm not ashamed to admit that I cried when it was over as it would be the last time we were all in one place together (as not all of us would actually be applying to the US for various reasons). I made some great friends who I'm still in contact with today.
The support they give, from taking the ACT right through to getting a visa, is so valuable and more than you can get from anywhere (even my pinned thread here can't compare at all), because it's so personal! They really work with you to know what you need and advise on how to get there.
I'd definitely recommend the programme to anyone thinking of studying in the US.