We have an Ergo that we use with our 19 month-old DD, but I tend to find my Mei Tais, especially my Kozy brand Mei Tai to be more comfortable. However, the Ergo is handy for times when your DC might want up and down a lot (like, say, at the zoo) because when the child is not in it, you can just let it dangle down from your waist without worrying about the long straps that a Mei Tai has. On the other hand, a Mei Tai folds up nice and small so you can stuff it in a diaper bag when you want to take it off.
We tend to reach for the Mei Tai much more because they are just so comfortable.
Another option to consider would be a Toddler Patapum. I believe it has a taller body than the Ergo, so that might make it somewhat more comfy.