I loved my Moby wrap when DS was small. We used it from the time he was born until he about 4 or 5 months. At that point, he didn't seem to like it as much, and we used the Ergo more. There may have been other positions DS would have liked more, but I didn't try them.DS slept all day in the Moby when I was on maternity leave, and I loved it.
"It is better to light a candle than curse the darkness." - Eleanor Roosevelt
I loved the moby and I'm a little sad that I didn't really figure out how to use it until DD was about 11 weeks old. I was going to be flying with her, so it forced me to figure it out. I would have loved it when she was a lot younger. I actually was able to use it until she was 9 months or so, somewhere around the 15 lb mark was when she got too big for it. Then I got a boba, which I'd still be using today (she's now about 25 lbs) if she'd let me.