I'm going to have to take a couple of cabs (and here's hoping they have shoulder straps) while on vacation with 5 year old.

How safe is the Compass folding booster? I just gave up the marathon for the Parkway. Can I stand to lose that little bit of safety and get a Compass folding which would be easier for the trip? Would it be worth the money? Should I be really easy going and just bring a backless Turbo booster?

I don't want to risk my daughter's safety, but want to minimize luggage.

Are there any boosters that don't require shoulder belt? Just wondering what those cabs have. Even thinking of bringing marathon since it can utilize latch, lap,or lap and shoulder. Increases the odds of finding a cab I can attach it to. But that Marathon sure is heavy!

Thanks experts!