The way it works Andrew is that the child can only lie with the head intowards the centre of the rear bench, there is no way to anchor the item with the childs head or feet facing forwards or rearwards.
The child is harnessed into the Babysafe sleeper which can only used in the full lie flat system in the car, even though when in use as a carry cot out of the car there is an option to life the baby up as in all other carry cots, this reclining system has a patented system that prevents it from being used in the vehicle in the upright position too, so there is no risk of misuse, which was one of the main failings of other items on the current market and something which the 'Which?' report slated them on.
The other difference with the Britax Babysafe sleeper is that it has a full integrated roll cage with across the vertical and horizontal axis. During impact most other lie flat items rotate forwards towards the driver, but this is designed so that during impact the carry cot rotates towards the seat, reducing the and controlling the forces on the child, and then internally there is a full surrounding area of impact absorption unlike most other items.
All of this is what gives better testing results than anything else available, and ensures that the child is as protected as they are in a tradition infant carrier, as otherwise Britax wouldn't have launched it
