What I have (due to existing reviews) misunderstood and is therefore not mentioned in the manual: The reclining backrest is not apparently used to bring the child when sleeping in a comfortable position, but to be able to adjust the seat different car seats. Namely, when trying to move the mounted in the car seat so (there is to a front handle under the seat) that the entire back part is flat, the stability of the Isofix attachment suffers much from it -> the seat wobbles (he is then also not well anchored to the back seat but has distance therefrom). And in this state, I did not dare launch a me.
Since this alleged feature is not mentioned in the manual, but also in the product description on Amazon (but actually only occurs in the reviews), I can give no deductions here. But mentioned in passing by the way, it would very difficult to carry out this adjustment with the child in seat back - because the seat is yes directly in the back seat and, together with the weight of the child has to be moved on this.
At a Glance: We (my son and I) are very satisfied.