Not that this seat actually fits my son, but I was considering it because of all the good recommendations I heard on this site about it. Now I wonder why it's recommended so highly when the seat widens and could potentially harm a child when it adjusts making the belt fit badly!
If it was say an 5-pt harness car seat with infinite harness adjusters and the harnesses slid and didn't stay at the right level no one would recommend that seat, so why the difference?
This issue is nothing at all like a malfunctioning harness. Not even close.
When the wings open up, it doesn't move the belt guide, which is on the headrest portion of the seat. It also doesn't cause the lap portion to move at all. The armrests that hold the lapbelt in place are fixed and have nothing to do with the wings. It does allow more room in the shoulder area, so the child could possibly move more to the left or right causing the belt to move a bit on their shoulder. However, a child that moves so much that the belt moves to a dangerous position has no business being in a booster. Even at the widest setting the belt still fit is still acceptable on my DD.
However, I have never felt my daughter was unsafe. I just check occasionally, just like I do with all my other installs, to make sure the wings are where they should be. :twocents: