I haven't used a moby. I'm loving my ktan. I'm willing to trade adjustability for ease of use. I already have an ergo, so I was just looking for something better for little ones and easy to pop in and out. I would think you'd need to lose a significant amount of weight to need a new size. I've used mine daily from day 4 to almost 3 months now.
11/12/13 at 7:30am