Baby Slings are recently coming into popularity in North America because the many benefits are being realized. Kiddicare
Baby slings are popular here too, but I find the best of both worlds works for me. Slings are actually quite difficult to use when shopping and trying to manouevere a bag etc. I use mine when Ryan just wants to be carried, but often still have the pushchair too. Didn't like it when he was tiny though as I just couldn't get him in a comfy and safe position.