Levemir's worked much better for me since I started doing more equal doses 12 hours apart. I'd initially been told "When you get up and when you go to bed, with higher day time and lower nighttime doses." and when I pointed out I often was only asleep for 6 hours or so and not the most consistent of bedtimes just got told to try it. I gave it 18 months, then got fed up with the evening meal sending me sky-high before bed no matter how accurately I'd carb counted and, in my case, hypoing almost every morning before work which is when my overlap seemed strongest.
I've virtually eliminated both since I altered the evening dose to go with my evening meal, which is pretty consistently 12 hours after I get up.