Looking at carseats, has anyone used this before?

Hillary • Mother of Three•Extended Breastfeeding•Cloth Bum•Attatchment Parenting•Homeschool Mama•IG: Darlinglittlethree
I already have a carseat/stroller (Babytrend Expedition ELX). However, I want another carseat and I'm looking at the Combi Shuttle and was wondering what others opinions are who have/have used this before? Do you like it? Do you not like it? Why?