Advice for Me and My Diabetic Cat?

I found out yesterday that Freya has diabetes. I thought she had arthritis, but it turns out that hind end weakness is a symptom of diabetes in cats. We caught it early, so she'll be able to go on insulin as soon as I make a decision about what kind of insulin she should go on. I'll change her food over even sooner.

My two insulin options are Can-Insulin and glargine, which goes by the brand name Lantus. Anyone have any experience with either of those? Any advice to offer?

Freya and I would very much appreciate it.