i sure did. but only because my kitty had dropped really low one day so i decided to stop and see how she did without it. good plan too, as she went into remission.
i think one thing to look for when going off the insulin (well in my kitties case anyway, im no expert) is seeing the numbers go down after eating. if they do, this mean the pancreas is starting to do some or all of the work on its own again. if the kitty is still diabetic, the BG will go up after food and stay up