I didn't buy our Izi combi for DS until he had outgrown his Britax group 0+ so never used it very early on but I'm confused as it says it is a Group 0+/1 seat but only suitable from 6 months. So is it not suitable for a newborn? DS2 due in a few weeks and need to get seats sorted and have lent my Brirtax to my sister in law who is not keen to return it just yet!