I'm using CitiKitty for almost a week now. There's been no accidents so far. I'll be cutting the first hole on Friday. I'm hoping that they'll be trained in 5 weeks. I can't wait until I leave town and have to ask my sister to stop by to FLUSH the toilet while I'm gone. I'm kinda looking into automatic toilet flushers now.
Every week, I moved the litter box one room closer to the bathroom (starting in the basement, to the bottom of the stairs, to the top of the stairs, to bathroom, then I took the cover off for a week, then moved the litter box on the toilet for a week). I put in CitiKitty last Friday, no accidents so far.
I figure it's well worth the risk. For less than $30, I'm willing to gamble and hope I never have to buy another bag of kitty litter again.
I was doing some research and found this blog that someone did. Interesting reading.http://trainingkitty.blogspot.com/http://trainingkitty.blogspot.com/2005/09/day-1.html
There's other blogs out there. This seems to be better written than the others that I've seen.