We have used Britax seats for our child from birth, this seat is the third and final one for us. We have previously been very happy with Britax, but were very disappointed to find that the design of this seat doesn’t allow the car seat belt to work properly. The red plastic guide on this seat pulls the car seat belt across at such an angle that the seat belt will not dispense or retract properly - both our cars are i30’s. I contacted Britax to see if they could assist and got no help or advice, we have had to stop using the red guide to be able to use this seat. By not putting the seat belt through the red guide, it is on less of an angle and works much better.