My son put this on every night so that I don't need to worry about whether he is out in the cold and keep waking up in the middle of the night to cover him. His feet can't be covered up (odd thing for my little man) so this sleeping bag works perfectly for him. I gave it a 4 stars coz its quite a pricey thing to be honest. Apart from that it is a 5* product.
I need to say, the product looks a lot better what's described here in the advertisement than the real thing itself. The who thing looks like it made of cheap plastic, my Nexus 5, while it's less than a month old, looked like an old phone as soon as I put this on. Sorry, not my cup of tea.
I have looked at other similar product but don't think they are well priced. This product works perfectly for my pram - i need something not to hold coffee cups but to stuff the baby scarf and hat and small toys. I like it myself.