According to information from the manufacturer of the system is identical to the 3S Aton Aton 4, the shortly after we bought, was published and since there are on the homepage of the Aton 3S also no longer. The Cybex Customer Consulting said in an email that it had only been changes in style. But I suspect that the name similarity of Aton and Aton 3 3S has meant that the sales figures due to the negative reviews for 3 model (not 3S ;-)) have plummeted, so another name had to be found.
For model Aton 3S itself:
Everything is stable and well-made, so you can connect to a high-quality product. The padding is soft and comfortable and can be washed at 30 ° C. Since our daughter unfortunately must spit again, we have to respect meanwhile repeatedly removed and washed. But that has neither the form nor warped let the colors fade. A washing peeling has not observed.
We have established 2-fix attached in the car with the Aton Base, since we only a three-door and once again a small car, in which the belt fits pretty tight around the baby car seat. The base makes it easy to mount the seat in the car - but even without it would be despite recently belt (in small cars) and in spite of climbing into the back seat (in three-door) no problem.
The height-adjustable headrest is great because one can quickly switch to the next size in the beginning so fast growing baby.
The bottom of the dish is slightly rounded so that you can create by gently nudge a rocking motion. This is very handy when the baby is sleeping and you still want it in the house can sleep on something in the bowl.
The fact that you can find the handle in different positions, you can also set a quasi swing brake, if one does not want.
Really great is the sunroof, which you can open ratzfatz with just one hand. It also protects super against rain, snow and wind, when you carry the baby in the shell of the house to the car or the car to the supermarket.
At such distances, it is not a problem the way that the shell is significantly heavier than the other manufacturers. I (1.65 m, female, not a bodybuilder) had no problems so far to carry our mouse in their skins. In my opinion, the weight of the better security dedicated and I take it like in buying; 1 - (2 kg more difference it's not compared to other manufacturers - that is ultimately a quasi Packerl flour ;-)) to wear.
With the appropriate adapter (noname, Amazon), we use the shell by the way sometimes on the rack of an ABC Turbo6s-stroller - namely when the small car is used and you have to dispense with the tub of the stroller for reasons of space. That works very easily with a few simple steps and our baby pudelwohl feels it when we walk.
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And the most important thing at the end: Unfortunately, I had become a slight collision (head-on). While our daughter sometimes wakes up even if we stop at a traffic light, she has slept through the accident almost completely. According to my co-driver (who was sitting behind), it has only just short times grimaced and then slept. She wore no injuries. I think that speaks for the good security with this dish ;-)
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Conclusion: strong buy recommendation!