I used it for my no 1. He slept generally well in it. But the main prob was that it caused him to have heat rash because of the angle was was sleeping in (natural incline), heat was trapped under his chin in e neck fold area and he had some heat rash. We had to make sure he didn't spend too long sleeping on it each usage. Note though, as some babies grown faster than others, some end up not being able to use the cocoona for too long. My boy outgrew it before his third month, I think.
You can check out taka. They had a shop space there last time near the stroller and pram section.