Another Emerald Coast customer here--was hired by my 1st choice on my first real interview ever. As others have said, I didn't know how not ready I was until I went to the seminar.
I did Albie's seminar back in April and didn't interview until late October, but after looking over my notes and going over my TMAAT stories I was ready.
Do not wait to do interview prep, do it now!!! Emerald Coast has a "customer for life" policy and you can always attend another seminar if required.
Also, for any UAL interviews--DO THE SIM PREP! I used FTI the night before my interview and it made the simulator event a non-event. $1100 is a lot of money, but I honestly would pay twice that amount knowing what I know now. Also, at FTI, I was able to do my practice sim in the same sim (same box) that I used on interview day. Not many companies can claim that.
Bottom line: Get ready for the interview before you get called. Get your stories in order before the call. Clean/polish everything up after the call and schedule your sim prep ASAP after a call from UAL.
Good luck.