We bought these because they were narrow and inexpensive, yet highly rated. Our challenge was to fir three kids (newborn, 4-year-old (around 43 lbs), and 5-year old (around 55 lbs)) in the back of an old Honda Civic. We'd kept our kids in 5-point car seats, but those seats didn't fit in the back of our Civic with a new baby seat. After a lot of online research, we decided to go with the Harmony - Juvenile Youth Booster Car Seat in Hot Rod color because of all the positive reviews. We easily got the seats configured in the car (Harmony Booster Seat #1, Graco Snugride, Harmony Booster Seat #2). The only modification we made was to buy two seat-belt extenders from the internet (Walmart does not sell these) for the rear of the car, so that the older kids could buckle themselves in. So far, everything has worked out great. The design is also really fun-- my 4-year-old loves fire trucks, so he LOVES the flames on these seats, and gets excited whenever he gets to sit in them. The only negative is that these chairs don't have a cupholder, but that's such a minor thing and I'm not sure it would have fit anyhow.