Checkout the CREP site. It has all the info including safety and made it easy to choose a car seat. We ended up not getting a capsule because I'm told they can be very heavy and awkward. It turns out that it was easy to resettle DD if we transferred her from the car to our bed... A bit of magic BB milk helped. Plus we couldn't justify buying or even renting a capsule when we would have needed a seat from 6 months. In the end we bought a seat that is for 0-4 years of age.