Our baby is now 3 months old and I've tried several times during this period to carry it by the "newborn" bet. This works simply not because of this too little support for the head has (it works as a rookie not even so). Meanwhile, they can hold him for a while quite well (every now and then with a short drop in between), but now he no longer fits below. The Po slips out constantly, as she sits on the cushion. If I try now to put in the stretcher, she begins to cry. (This is, incidentally, not because they would not be used, because the sling there are no problems).
Conclusion: No buy recommendation. Prefer to invest in a good sling for starters.