Britax Marathon Onyx Convertible Car Seat Reviews
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Britax Marathon Onyx Convertible Car Seat

216 ratings (187 Epinions reviews)
Epinions Product Rating: Excellent
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Britax doesn't let you down.

Apr 3, 2009 (Updated Apr 4, 2009)
Review by  
Rated a Very Helpful Review
  • User Rating: Excellent

  • Durability:
  • Ease of Use:

Pros:Easy to install.  Daughter is comfortable.

Cons:Tether doesn't work with our car.

The Bottom Line: I would recommend this car seat.  I believe in safety first!  Don't let your child in a booster, a lapbelt, or anything but a 5-point harness at this age.


When looking at car seats, we had narrowed our choices to the Britax Marathon and the Britax Boulevard.  Honestly, we picked this one in the end (over the Boulevard) because of it's nice neutral color cover and the fact that it was on sale at Right Start for $225.  The cover is changeable and washable.  You can order a new one from their website if you need a new one. 

Safety:
I am a protective mom and wanted to put my daughter in a car seat that was the safest on the market.  While I wish there was a governing body forced to release all crash test data and TELL us which ones are the best, I settled for listening to friends, family, and reading online reviews I could find.  This has the 5-point harness, with shoulder straps and straps coming between and around the legs.  It is very easy to buckle.  There are 2 sets of buckles, one across the chest and one at the crotch.  The chest buckle is very easy to move into the proper position.  There is a button under the bottom buckle for loosening the straps when getting your child in/out.  It's so easy!

Installation:
You can use the Marathon with the LATCH system and it has a tether.  It is easy to move from car to car.  In my car, it fits in the center, uses the seatbelt and the tether.  In my husband's car, the Britax goes in the center, uses the LATCH, but the tether does not work in his car.  The car's holes for the tether are just too small for the hook to go in.  I don't know if this is a common problem to lots of car seats or not.  The carseat takes only about 3 minutes to install properly.  There are extra safety latches on the sides of the seat, which tighten the seatbelt and keep it from moving.  When installed, the Marathon moves only a fraction of an inch, even when my husband puts all of his weight into it!  When buckling in our child, there are convenient velcro strips to hold the straps out of the way while you put the child into the seat.  These are a great feature!

Adjustments:
When changing the straps to accommodate our growing girl, we realized how super easy it is!  Our last carseat was a Combi (which I do not recommend) and the straps never fit properly.  In the Marathon, the strap adjustments are very easy to change, only taking less than 5 minutes.  We have also had to take the cover off to wash it, and found that it was just as easy.  The cover did not shrink or fade when washed and looks brand new after multiple washings.

Comfort:
The seat itself sits higher than others I have seen.  This makes it easy for our child to see out of the car windows.  It is also super padded and the fabric is soft.  The sides are high, giving her something to rest her arms on. 

Size:
After choosing this seat, I realized how much my child was ready to move up to this size of a car seat.  The Britax Marathon fits children rear-facing from 5-35 pounds.  (My daughter is 25 pounds and still happily rear-facing.)  It can be turned at a year or 20 pounds to forward-facing, though it is recommended that you leave your child rear-facing as long as the seat allows.  (This is safer.)  Forward-facing, the seat may be used for children up to 65 pounds. 

Why Britax?
I watched the youtube video about a boy who died because he was not in a 5-point harness and vowed that my children will have one until they are as old as possible.  I refuse to turn her forward facing just because she is 15 months old.  Anyway, I had a friend who was in a car accident with her young twins and neither was hurt.  They were in this brand of a carseat.  That really helped sell me. 


Recommend this product? Yes


Amount Paid (US$): 225
Age Range of Child: 12 to 36 Months

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