You could have him leave the small piece of rectum that they use to connect the j pouch for a later time if you don't think you can make up your mind up soon. For me it was a no brainier. I really don't want to have a permanent ileo. There are people on this site that do have them and they are fine with them. All pouches, weather it is an ileo, j pouch, k pouch, or BCIR, they all have advantages and sometime draw backs. I guess you have to decide what is important to you personally.