we just bought hte baby love ezy combo carseat - very similar seat with weight ranges etc

the ability to adjust the car seat is HUGE - there is extra padding around bum and head for when baby is small, there is several spots to adjust the six point harness, and then proper guides and attachments for the seperate H harness to use with car seatbelt later. i would struggle to put an 8kg bub in it personally cos i think they'd be dwarfed - but at 12kg, it would probably be ok to use. you'd just have to make sure all the extra padding was in the right place so that he was secure. i know a lot of people go from capsule to sns maxi rider, which is a very similar carseat...

fwiw - i did some research just recently into the safety of the carseats in that weight range as we wanted to get a new seat for DD. after reading recommendations on here for the ezy combo, i checked it out on choice and it came up safer than the safe n sound maxi rider. the hipod wasn't rated so i can't comment there. might be worth having a look into it a bit. there was a thread about seats 'similar to maxi rider" - may be worth having a look at hte recommendations from people that use them on here.