Pros: Good for heavy babies, doesn't cause back pain, easy to use
Cons: Doesn't come in a variety of colors/prints
We have had our ERGO Sport for a little over a year, and we love it. DH will wear it because its black and not too "girly" looking. I will wear it because it doesn't hurt my already aching back. Our LO is well over 20 lbs, and I still wear him on the front for hours with no pain. We like the Sport version because we stay cooler. Our LO is a furnace, so we want as little fabric as is necessary so we're not sweating!