Had anyone got one of these? Or even seen one in the flesh? I can't find a local stockist so would need to buy one on the net. I have very severe back problems and find the car seat a complete nightmare (to the extent I often won't go out or accost strangers to help!). But I've seen this advertised and thought it might be a good idea? But obviously am loathe to spend that amount of money if it's not as good as it seems. Be grateful for any reviews/feedback. Thanks!