I have 2 ring slings, a pouch sling, two stretchy wraps, a mei tai, and an Ergo. I don't like the ring slings much; they mostly live in the car for emergencies. They were great for carrying my toddler while huge pregnant, though! I have friends who love their mei tais for younger babies, but I really love the Moby-type wraps for tiny babies. My middle son lived in the Moby 12+ hours a day for months. Jack is not a huge fan, but he will nap in there and hang out when we're out and about. Once he gets too heavy for the Moby, I'll have him in the mei tai or Ergo. I love the look of my mei tai, but the Ergo is definitely easier to put on and more comfortable for longer periods. I used to take my kids to work with me, and I wore a napping DS1 on my back for hours when he was 18-20 months or so and I was 6 months pregnant! I've never used the infant insert with it, though, and I haven't personally heard good things about it.