Has anyone used the Maclaren Major Elite Stroller Designed for children with special needs? If so, what are your thoughts on it? I have seen it here in one of the baby shops and it has been tested for kids up to 50kg. I would like to buy this for my son as we are going to be doing a lot of sightseeing here in England and I don't want him to miss out, or have to restrict which tours and sights we…