I've only had my J pouch just over a year and life's good, everything works better than was suggested.
On average, 3 to 4 BM's per day, not every day, sometimes 5, maybe 6 but never less than 3; I can go for a couple of hours between BM's and there's never any urgency, although there's the odd accident and some leakage.
Most days, I'll have the first BM in the morning then the next will maybe mid afternoon, then quite a few from early evening onwards, no idea why.
Most BM is during the evening.
I have no night time toilet visits, other than to pee.
I eat anything I want and when I want to; other than an occasion after eating a banana and a bag of peanut, not together, different occasions, food has never caused any issues, even before my colon removal.
After takedown, I left hospital about 4 days later and I was able to take a 4 hour train journey home, only needing the toilet once, since leaving the hospital.
Just after takedown, I endured excruciating anal pain, either butt burn or a fissure, and from time time, although rarely, I still do; which was and still is, alieved by the use of ilex protectant paste.
When I had the Stoma and temp loop ileostomy I used every paste. cream, powder, potion and concoction available to relieve the pain and discomfort caused by a leaking colostomy flange; that is, until I discovered the ilex paste; and within days of applying it, the broken, weeping, painful and oozing skin around my Stoma was healed.
ilex works for butt burn too, I suggest you buy some.
My only issues, the accidents, leakage and remembering to consume enough fluids to remain hydrated.
Otherwise, life with my J pouch is good.