Sleepyhead

We have a sleepyhead and our little girl sleeps so peacefully in it during the day and can sleep for up to 4 hours in it, however she hates both the Moses basket we bought and the Chicco Next to me crib we have tried when sleeping overnight.

I’m really confused about whether sleepyheads are safe for babies to sleep in overnight? The website says they are suitable for co-sleeping and I can’t think of many differences between having the sleepyhead in our bed or having it in the next to me crib? I have several friends who have let their babies sleep in the sleepyhead but I’m unsure based on all the conflicting articles I’ve seen online!