I love my Graco Quattro Tour Duo Stroller. It is a must have for my four kids. We have had it for two years. It is pretty heavy to lift in and out of my car, but I can deal with that in order to have the heavy duty strength of it. My 6 year old can sit in the front seat if for some reason he needs to rest. Mostly, my two year old and four month old use it. Occasionally, my three year old will sit in it. The only thing that has broken on it is the back seat cup holders. I was really disappointed that this broke because it was really convenient, but we have dealt without it. The carrier on the bottom...