Reviews Britax Marathon 70-G3 Convertible Car Seat, Onyx

We love the Britax Marathon 70. When my son grew out of his infant carrier seat, we purchased this for our convertible seat. We immediately loved it. Our son was comfortable, the seat was a breeze to install and overall the quality was very impressive. However, because we thought it was expensive, we used this in our main family car, but decided to buy the cheaper, but still safe, Cosco Scenera for our second car, which is really only used from daycare and back. After a few days with the Scenera, I couldn't take it. Our second car is a small Mazda3, but the Scenera didn't fit well and it was so cheap! After three days, I was sick of the straps twisting and it was so low quality. We decided to purchase another Britax Marathon for our second car and I couldn't be happier. Despite it being a bigger car seat, it actually fits BETTER in my small car than the Scenera. I was shocked. I can't say enough about this convertible - highly recommend!

This car seat makes the other two I have seem like crap. I was given a Safety First Alpha and Omega, it's ok but it's hard to install correct and currently it is slanting to the left, I have to figure that out. I also bought a cheaper $40 Cosco Scenera from Walmart as a back-up car seat to go to my mom's. It is hard to get tight and it moves a lot front to back.

I had looked for a car seat for a couple weeks. I read review after review. Anytime one had a negative review I debated whether I should get that car seat or not. I started getting a bit paranoid about getting the perfect car seat for my daughter. I mean she is my most precious cargo.

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