Re: Diet
Keep in mind that most of the diabetes medications that you take will encourage weight gain. Be prepared for your doctor to list you as 'non compliant' when you don't lose weight or the medications don't lower your sugars long term. Also be informed about what your doctor is prescribing. They tend to go the more drugs = more better route. I expect to be on daily insulin for the rest of my life because I trusted the experts. The general consensus is that my pancreas no longer produces insulin.
Having changed doctors several times over the years, something new doctors just won't listen to is: obesity didn't cause my diabetes. Diabetes caused obesity. I wasn't significantly overweight when I was diagnosed pre-diabetic. One year on Actos changed that.
The biggest factor in the prevalence of T2 Diabetes is the NHS advice to cut down on fat. This has led to the population's diet becoming carbohydrate heavy, which leads to the extra weigh and places too much strain on the Pancreas causing it to become less efficient or stud down. It's the same as any engine - run it too hard and it will not last as long!
The low fat movement is a major cause of the outbreak of diabetics over the last 40 years. Having more carbs in our diets wouldn't have been so bad, if it weren't for the fact that food producers replaced fat with sugar. You can't just say "I've switched to diet soft drinks, I'm good". Look at the amount of sugar in any bottled juice. And for bonus points, check out the sugar in a serving of Ketchup. For most people, just wandering the aisles at the grocery store looking at the labels on 'healthy' food would shock them.
While this tech would be wonderful for helping manage the sugar roller coaster, I don't think we'll get past this until the food industry is reformed. There needs to be better options for people who aren't wealthy or chefs. Also, as someone else mentioned, having worked a career in IT I'm skeptical about using just any device to manage insulin.