I too am diabetic, and have been using this site for a year. My diabetic educator was the one who told me about this site. It has helped me in maintaining my weight loss, and keeping an eye on my daily total goals for carbs, calories, fat, sodium.
Start weight when starting tracking with fitday:
314- Nov. 28, 2011
Current weight:293-Dec. 14, 2013
My Desirable weight: 125-160 (Lowest-Highest)
I'm just making lifestyle changes.