I think the whole idea of stopping the insulin can be scary for many people Ruta. To think that our cats can actually heal their pancreas and don't need insulin anymore is amazing. I was afraid too.
The first time I stopped giving Wink Wink Nudge Nudge (yes, that's his full name) insulin, it was because he had gone low too many times for my comfort level. He kept dropping into the 30's and 40's and I kept dropping the dose by tiny increments. Finally, I told myself, enough is enough and I really needed to stop the insulin for a short time, to let him stabilize. I was going to only stop the insulin for a couple of days, let the depot drain and start him back up on insulin at a very low dose, maybe 0.25. Somehow, it turned into my first attempt at an OTJ trial, with some people here encouraging me to try a trial
I decided at the end of this first OTJ trial, that I was not happy with Wink's numbers, got a couple of 130's- 140's. I wanted to see more consistent greens, not so many blue numbers, so I put him back on a very low 0.1U dose for a couple of weeks. Plus, he got another UTI and was back on antibiotics and those UTI's always pushed his numbers higher. I wanted to make sure Wink would have a strong remission and be able to be diet controlled for as long as possible.
I probably would have kept him on that tiny dose a bit longer, but the shelter insisted on my taking him to the vet for a curve and they had me bring the insulin vial with me and did not give it back to me! They vet said he did not need insulin anymore.

:shock:

I thought to myself, this is scary, what if his numbers go high again? What am I going to do? Now, I
HAD to do an OTJ trial, Wink's 2nd trial and he made it this time. He got almost all green numbers, only a couple of low blue numbers at the start of OTJ trial 2.
It was scary to me to think that I had no insulin on hand if Wink went high, over 120-130. It's been 8 months now, celebrated that 8 months on 11/12/2013 and he is still not needing any insulin. He has been diet controlled all this time which simply amazes me. I never expected this remission to happen when I took Wink in to foster. The diet change and more consistent dosing really helped him, along with being out of the shelter environment. I was just trying to get him better care in my home instead of the shelter.
I have not officially adopted him yet, but I'm thinking about it. Maybe, this will be my Christmas present to myself this year.
I hope that sharing Wink's story with you will help you to make a decision on the insulin for your beloved Cupcake.
ETA: I still test Wink at least once a week. I want to catch those BG numbers if they start to go higher and get him back on insulin if he needs it.