The Graco Comfort Sport car seat was given to us by my parents. We planned to use it in our secondary vehicle, which my daughter basically only rides in for two miles each day on the way to daycare. It is a convertible car seat that can be used rear or forward-facing. This means you can use it from infant to toddler.
When we had the seat rear-facing, we found it very difficult to adjust the straps. I could only think that they must be getting stuck or tangled underneath. I was hoping that it would resolve itself when we turned it forward-facing, but we are still finding the straps difficult to adjust (tighten and loosen) and they also twist easily, which is a pain when you are trying to get your child in and out of the car smoothly and quickly.
I would not recommend this car seat unless you have a high level of patience (which I do) and if you are careless and do not mind if the straps are twisted or not tightened properly on your child.