I first found the Moby online and purchased one for my niece when she was having her daughter. I had heard good reviews a bout it and thought it would be a great gift. My niece has never commented on the wrap (she lived in Hawaii) and I guess I have never really asked her about it. I assumed it was great.
With my daughter we used a Maya Wrap and really liked using it. In fact, we used the Maya up until my daughter was about 4 years old.
I purchased the Moby Wrap to use with my son and it was so confusing and the amount of fabric needed was insane. It took too long to get it on and felt cumbersome when used in the car. I finally gave up.