Be aware that while they may send a number of cadets, the school only has an allotted number of slots, fewer then what shows up. The school will trim the number of cadets, some will drop out and others will be dropped, sometimes for not completing certain tasks and sometimes just because they need to trim the numbers.
My son was one of the unlucky ones, he got a 349 on his first APFT, completed the first week just fine. When the second week started they had another APFT, this time he failed the sit ups, just stopped counting a couple before the minimum. He was sent home later that day, he knew it was coming because the night before someone slipped up and said they were taking him and two others to the airport the next day.
He was told before he left to apply again, he was offered a slot this year but because of how busy he was at school he chose to do CTLT instead.
If you are lucky enough to get a slot just be ready for anything and don't take it personal if your sent back, it happens.
Although my son didn't get the chance to continue he gained a lot of confidence from just the first week, not everyone gets to feel what it's like to drown. You will be pushed past what you think is your limit.
Jcc123 is probably the best source of information on this board about the course.
As far as being selected, my son's stats were very similar to Jcc123's son, except for the triathelte part.