[s-cars] Booster seats

[chris chambers]

Gentz,

With our daughter about to turn 4 my wife thinks it's time to get a booster seat.

She's been riding in a Britax seat, which I've been confident is a safe seat.
Viewing the booset seats in the local big box store I didn't have the same
confidence in the available booster seats.

Should the switch to booster seat be based on age, weight or what?
Any particular features to look for in booster seats.

Any known good brands?

thanks
Chris

PS said booster seats will be used in an 02 Allroad and 95 S6