I wish I had time to browse thru all the other threads but I really don't! I need to find a booster for DS1 for our return to the USA. For left in November for Europe and he was pretty close to outgrowing his Britax Marathon, so I'm assuming it will be too small when we return in 3 weeks! Here he used a Romer high back Booster (I believe that's a Britax company for Europe, but could be wrong!) It was ok although we only used the car a few times a month. We could bring it but will be coming back next fall and don't want to deal with that in the plane. We will also be leaving DS2 Radian here :( and switching him to ff in the Marathon (he will be 3 1/2 when we get home). Unless someone convinces me to get a new radian for him... Would it be worth it you think? The only car seat we are bringing back is DD's radian that will be used by DS2 in the plane... I know I'm not easy to follow lol So basically I need help finding a good solution for us but for sure a safe reliable car seat/booster for DS1! Thanks for reading my random thoughts... And helping in any way you can!