We're expecting twins and are set on the Mountain Buggy Duet for our pushchair. Makes sense for us for the width. I'm not sure whether to go for the carrycot+ or the cocoons though. I spoke to someone who only used the carrycot+ until 6 months as the parent facing seats were a bit rubbish. So I'm wondering if the cocoon would be better as much cheaper and seems easier to put on and off. Has anybody used the cocoon and how long did the baby/babies stay in it for? Or has anybody used the carrycot+ for longer than 6 months?