I don't think the app review can be emphasized enough. It's great if you have all the bells and whistles and a person to write an internal rec. If your app is not perfect when you make it visible and your bro writes that rec, you very likely wasted a year or at least six months.
A friend asked me to write a letter and I was more than happy to. Found out after the fact that his app was pretty much toilet paper and he thought he would have time to make it look better later. Uh. No.