If our child falls asleep after feeding at the breast, we give the suction for 5 minutes, so you can take the child, without being awake again. Unfortunately, our child is taking this sucker is not quite so happy ... the rubber nipple in my opinion is a bit too long. The Baby Love Sucker (DM) for 0-6 months have a significantly shorter rubber nipple, with this, it works better.
Otherwise, these suckers do a very good impression, are stable and have a very smooth surface. From the age recommendations ago I would rather classify but in 2-6 months.