I just wanted to make sure that I have all my bases covered before I try to trade for 2 GGUs.

I want to book o/w tix for my wife and I using a Comp. Fare Cert and then applying GGUs so we can u/g to First. The flt. is next Oct., BOI-BOS. Everything I've read seems to allow this. I did a fake booking all the way to where I enter the GGU codes so it looks good. initially I had to pick coach seats but I assume that I can pick F seats after the GGU codes are entered.

Are there any 'potholes' I need to be aware of? The flt does show the black F beside it.