It's nice to read stories like yours. I did start levemir yesterday, as I was on lantus before for something like 9 years. Since 2 years, lantus just did not work anymore ; it was creating a lot of very bad lows. There even was a situation where I had to take more than 200 g. of carbs because of a low that happened 1 hour after I injected the lantus.
As I do a lot of sports and hard training to keep a good health and a good diabetes management, I realized that for some reason, with my body, especially when I train intensely on a day, my cells will easily recognize lantus and "make its magic work" in an hour or so. The worse part is it is never acting the same way, so I was sometimes taking only 8 units, waking up at 5 am with a big low, sometimes taking 25 units without having any problem. I got so frustrated at lantus...
However, in 24 hours, things have been kind of good with levemir; i sleep at 9 mmol (170) with an 8 units dose, i woke up at 5.3 mmol (100), and took a second dose of 6 units and it worked pretty fine, without causing any lows. The only thing that I noticed is my body was especially sensitive to insulin when I was at the gym today. (This is another story, but it seems so complicated to do sports as a diabetic; you need to to help managing your sugar and make the insulin more efficient, but it creates unexpected lows at unexpected moments during the day...).
Shall I also share this information that I red (but haven't verified). Apparently, the duration of the levemir action varies from 6hours to 21hours depending on the dose taken. The stronger the dose, the longer the effect. As our hormones start to make our liver produce sugar at 6-7am, if the dose is too small before sleeping, it might be only to cover the night (something like from 11pm to 5am) which is kind of pointless...
Anyways, up to now, I have not experienced at all this "I am taking so many units and I wake up with highs" everyone is talking about...
There we go. I just wanted to share a part of my experience, if it may help anyone to consider important points or hypothesis while solving a diabetes management problem...
Hopefully levemir will be good... even if as you guys know, anything could change, at any moment...!