Hey, I loved my Nojo! Note the ages of my children, please, before you flame.
IIRC, neither of them used it as brand new newborns; I was given a snuggli at a baby shower before dd was born and didn't trade it for the Nojo until she was about a month old and ds needed to be held skin-to-skin on my arm until he was about two weeks old.
I used the cradle hold for the littlest ones and did feel most comfortable supporting them with my left arm. Adjusting the length was a bit tricky too; we were most comfortable with it hitched up a lot tighter than you might expect, and it would slowly loosen up as the day went on and need to be retightened.
I used the Nojo until my kids were about two. I was a non-driver, so we walked and took the bus everywhere. It really was very nice at the time, although from what I hear there are better alternatives available in this day and age.