Difference of a convertible car seat and a booster seat one?

I just loosen the straps on my sons car seat because I never thought about it because I thought they were at there max but I have extra money from income taxes so he will need one after he outgrows this one so any suggestions perfer to know the one you have and how do you like it and whats its cons and pros in... show more I just loosen the straps on my sons car seat because I never thought about it because I thought they were at there max but I have extra money from income taxes so he will need one after he outgrows this one

so any suggestions perfer to know the one you have and how do you like it and whats its cons and pros in your opinion
6 answers 6