Hi Cole,
I'm one of the j-poucher's that ended up with a failed j-pouch. I had to have it removed and now have an ileostomy. That said I would still recommend trying it. I would have always wondered how things would have gone with a j-pouch if I hadn't gotten one.
I recommend that if the time comes you find a very experienced surgeon. I wish I'd had one that did the surgery laproscopically. In my case the retained 2 cm of the rectum used as the "cuff", to staple the j-pouch to, caused disease that made it impossible for me to keep my j-pouch.