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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Great for our peace of mind

May 5, 2009
Review by  
Rated a Very Helpful Review
  • User Rating: Excellent

  • Durability:
  • Ease of Use:

Pros:Very comfortable seat for tall babies/infants
Removable cover, padding can all be washed

Cons:Expensive
Big- takes up lots of space.
Must have top tether anchor for FF- not avail always

The Bottom Line: Love the seat. You should "test drive" to ensure that it fits your vehicle- RF needs lots of space and top tether anchor is necessary for FF install.


Bought this seat with 20% off coupon at BRU to help defray exorbitant cost. We are really glad we spent the money.

Our tall infant son is very comfortable. The summer heat in NC will cause everyone to sweat, and this seat isn't the best ventilated due to heavy foam padding. The straps and cover are all removable to wash (vomit happens), though it takes a while to reassemble. THe cover is sturdy and has survived 2 handwashes to this point. The shoulder straps are a bit difficult to reposition as child grows, since you have to rethread through the cover, thick foam padding and the bevels plastic slot--getting these into alignment is cause for celebration. But I have done it several times, so it is possible- just aggravating. The best part of the seat is the single pull strap tightener- keeps straps even and allows you to snug slowly over chubby thighs.

Easily installs with LATCH in our Honda Pilot. It can be reclined if driving on longer trips to allow better sleep, but you have to undo the LATCH and upper tethers to accomplish this- this is not a small adjustment. (Of note, installation in our 1998 Jeep Cherokee not possible in middle of rear seat as top thether anchors not avail in the center of the vehicle.) RF is very difficult in any vehicles smaller than a Sherman tank; we had to slide the driver/pasenger seats forward when RF- though we are both tall.

Overall, have had this seat for 6 months and are really glad we spent the money.


Recommend this product? Yes


Amount Paid (US$): 230
Age Range of Child: 12 to 36 Months


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