Do you feel more inner peace now or when you were serving as a JW?
No matter if the teachings were wrong, or not exact, I had more inner peace when I was "in".
I remember when I got operated for a hernia, and had to be put asleep, while I was a JW in good standings. I knew that God would resurrect me if ever something went wrong, and I didn't wake up from the operation.
Today if I had to undergo an other similar operation, I'm not sure I'd have the same inner peace.
I think that no matter what religion you practise, no matter if it's false or not as false, you develop this inner peace, that may only be an illusion.