Hi, I'm keen on getting an ergo but not sure which one. I currently have a baby Bjorn but am finding it really hard on my shoulders, and ds3 who is 4 months old likes to sleep on me! With 3 children I'm in and out of the car with them a lot so want some thing comfy and easy to use. I also read there have been some fakes going around, any advice on making sure you get an authentic one? We are going to the baby and toddler show on the weekend and thought we might get one there nd do you like them?! Thanks!