My boyfriend and I were living in a two bedroom apartment with our two precious cats and I quickly grew tired of having our limited space mucked up by stinky cat litter. I came across a posting online, by someone who had successfully toilet trained their cat. It sounded too good to be true and trust me...it was! We first purchased a toilet training kit from Petco I believe it was. It sounded good in theory. The flimsy bowl shaped plastic device would sit over the toilet opening, be filled with litter, and essentially act as an elevated litter box until they were comfy jumping on the toilet to relieve themselves. It didn't take long for us to realize that a thin layer of wobbly plastic was not possibly going to prevent our kitties from dunking themselves in the toilet. We didn't even manage to punch the first hole out of the training aid before we threw it away. We decided from there to attempt the impossible on our own. We journeyed to Wal-mart and purchased a large stainless steel mixing bowl that fit quite nicely inside the toilet bowl. We filled it with our Swheat Scoop cat litter and had the kitties using it as though it were a regular litterbox in no time flat! We were thrilled they had adapted so quickly. Once we were really sure they were happy with that arrangement we proceeded as the article online instructed and began lowering the level of litter. The process became a bit messier but our kitties were still ok with the change. Once it came time to replace the litter in the bowl with water, they had had enough of our experimenting. We took the bowl away altogether and they would hop up on the seat to pee just fine, but the position for pooping was a different story. They had a difficult time balancing on the rim and at the first sign of water splashing their little tushies they freaked out. Eventually they began peeing in the toilet but pooping on the floor. I even went so far as buying a motion activated frog that ribbited when they were in the vicinity so I could catch them in the act, but it wasn't enough to fix the problem. We returned to a normal litterbox and when we purchased our new house in March tried out the "one and only cat toilet" which was another headache altogether. After that fiasco we wised up, bought a Littermaid, and the four of us have been happy ever since
Hope my experience in this department helps! hehe.