Hi, my son is five and he is a Joie high back booster. Sometimes I feel like the seat isn't stable so have been looking at alternatives. I've noticed you can buy high back boosters with isofix fittings.
Are they worth the money? I would of thought they were safer but have read isofix doesn't make much difference with high backs.
The main reason to use isofix with a HBB is to stop the booster moving around inside the car both when the child is getting in/out and when the booster is empty (you're supposed to strap the seat in, even when your child isn't in it, as if you had a crash it would become a projectile. But hardly anyone does.)
It won't make any difference at all to safety, it's just convenience.