The Moby is hard to deal with until you get used to it. I bought one about a month before my son was born, and never took the time to learn how to use it before the trip to Disney we took when he was 3 months old. I still haven't learned how to use it, even though my son was around 2 months old when we bought it. He just turned two a few weeks ago.
I don't think it would be a good choice for a child who is older, but not walking much yet. I think it would be best for a child who you plan on keeping in the carrier most of the time. I also imagine it would be quite warm with all the fabric.
As an alternative, I have a Lillebaby carrier, which I used frequently until my son started walking at around 22 months (late walker). It's similar to the Ergo, but I got it on eBay for around half the cost, since it's not as well known, so there wasn't as much competition. It has a face out option, but as with most (if not all) face out options, it isn't the best for the baby's spine. I still use it occasionally when I need to be hands free and move quickly, but has started getting quite heavy in the carrier, so the Ergo might be a better option as it's padded more through the shoulder straps.
You could look into a ring sling or mei tai. Baby-wearing, in general, is largely preference based, so something that one person raves about might not work for you. There are definitely some types that work better than others once a child gets bigger.
