Hello, has anyone used either of these and is the New Generation worth paying the extra for. I'm currently working out which one to buy - I have a 15 month old and have some flights to do on my own - I used to use baby bjorn with lumber support and really liked that when he was smaller and flying on my own so now looking for something to replace that. Also does anyone know if I was to buy one of those bigger more travelling rucksack style ones can you take those on the plane with your hand luggage and taking your pram to the steps of the plane or do you get charged more one of the more sturdy bigger metal framed ones. thank you!