Opening this business card versus one of the personal Marriott cards will help you stay under 5/24 longer and that's the main benefit of this card. I do like the annual free night certificate, too — and that you can top it off with up to 15k points.
Be sure to pay close attention to all the eligibility rules when applying for any Marriott card as they are pretty convoluted!
Check out my map of family friendly Marriotts for inspiration.