This is the summary of consumer reviews for Britax Marathon 70-G3 Convertible Car Seat. The BoolPool rating for this product is Excellent, with 4.70 stars, and the price range is $212.77 - $289.99.

The Britax Marathon 70-G3 convertible car seat is a rear and forward facing recline, designed with various high-end revolutionary safety features for child’s comfort and positioning. It comes with a Safecell Technology Base which is designed to compress in crash, significantly lowering the center of gravity and counteracting the forward rotation of the child seat which normally propels the child toward the front seat. A side impact protection system comprised of deep side walls lined with energy-absorbing EPP foam distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body.

The Britax Marathon 70-G3 can transport children from 5-40 pounds in rear facing position and 20-70 pounds in forward facing position. The 5-point harness is tangle free with an EZ-buckle system to retain the harness buckle in a forward position to prevent the child from sitting on the buckle when boarding. The harness holders keep the traps pulled to the sides to make boarding quick and hassle-free. The Energy-Absorbing Versa Tether has a two-point attachment to minimize forward rotation while anchoring the top of the child seat. Other great features include a no-rethread harness and an easy-remove cover that allows access to belt paths from front. The two buckle position provides a snug and secure fit. The recline positions, comfort pads, and infant body pillow provide premium comfort and positioning.

Some reviewers mention that this seat is bit heavy and also not suitable for taller babies. It does not come with an infant position insert and at times tightening the straps in rear position could be difficult.

Overall, the Britax Marathon 70-G3 convertible care seat combines safety, comfort & ease for the ultimate value in child safety. Compact and plush design makes it a desirable companion even for aircraft travel.

Specifications:

• Weight: 19.5 lbs
• Dimensions: 18.5W x 26H x 21D inches
• Seating Compartment Height: 23.5 inches
• Seat Area Depth / Width: 11 / 11 inches
• Shoulder Width: 13 inches
• Harness Slot Heights: 8.5 / 9.5 / 10.5 / 11.5 / 12.5 / 13.5 / 14.5 / 15.5 / 16.5 / 17.5 inches
• Buckle Strap Depths:  5 / 7.5 inches