Top Pick for a Combo Booster
My daughter is five-and-a-half, and petite. She still fit the weight and height requirements of her Britax convertible seat, but it was about to expire, and I wanted something that would provide many years of use, and incorporate a five-point harness up to a backless booster.
The Frontier 85 does not disappoint at all. She loved the color combo, armrests, and cupholders. I love the safety features and durability I expect from Britax.
The only issue I had was installing the seat. We've had several Britax seats over the years and this one was the most challenging for me to install, but I'm okay with that since I won't be moving it to another car.
Please note, while the booster itself has a much longer extended expiration date than traditional carseats, the LATCH requirements are still based upon your car. So if your car's LATCH limit is 45-pounds (for instance), then you cannot use the LATCH system of this seat once the child's over the weight limit.
Despite choosing to use the 5-point harness with my daughter still, she is tall enough to use the shoulder belt instead. I like having the option of keeping her in a safer harness that's appropriate for her size, while giving her the enjoyment of having a "big kid" seat.
Installation can be challenging