i'm even more confused now! LOL

just to clarify- the maxi-rider is suitable up to 26kgs, but once your kid reachs 18kg they no longer can guarnatee the strength of the straps so you need to start using the actual car seatbelt with a Protecta harness. They can then stay in this until 26kgs. The problem i have, is that the protecta harness is uper fiddly and a PITA to get them into.

i looked at getting the safe and sound hi-liner seat- but you still need to use the protecta harness, so i don't see any advantage in using this seat over a maxi-rider (except for the fact that if your kid is super-tall, they may actually outgrow the maxi-rider height wise and then you would need to move them into a hi-liner as this can go higher).