Hmmm. Just looked at the dimensions on the website and the Maxi rider AHR does extend higher than the booster. I wonder what this lady was going on about then? The AHR bit goes down a fair bit too so i dont understand why it wouldn't give the appropriate support for a two year old. DH said he is just going to baby bunting and buying it from there so we dont get the third degree lol. When i went to buy it yesterday they made me talk on the phone to a lady who specialized in child safety restraints but the one they got out was just the maxi rider not the ahr so maybe that makes a difference?