I had a mini sternotomy done mid September and am very pleased with the results. The scar is small (just under 4 inches) and, at 7 weeks post surgery, I am able to do everything I did before surgery. However, that said, this was still major surgery and it felt like it. There were only a few days that the pain was very bad, but I wasn't able to sleep on my side until week 6 and it still hurts some when I take a deep breath or turn around to back out of my driveway. Also, I have a fairly large (maybe 4 inch across) area of my chest that is numb to the touch, and it's unclear how much feeling will return to it.
As my cardiologist told me, this surgery provides a better cosmetic result and a small reduction in healing time (maybe one less day in the hospital and one less week before the sternum is fully healed.) That may not seem like much, but let me tell you, I was very grateful for that day and that week at the time. Overall, I'm very glad I got the mini, but I think it's important to have realistic expectations about it. Best of luck, Kate