The seat is FAA approved but it cannot be installed with a plane seatbelt. The seat is designed so that the belt goes between the plastic shell and the cushion (which also means that the seatbelt installation cannot be done when the baby is in the carseat). Unfortunately, that means that the plane buckle ends up under the baby's back or bottom (if rear-facing). No way around it. I tried on 3 different types of aircraft from 2 different major companies, with and without seatbelt extender, nothing worked. This is a bad design flaw for a seat that is sold as FAA approved. Obviously it has not been tested for airplane travel. Read more

I just returned my Extend2Fit because it seemed no matter what I did, I could not get my daughters straps securely against her chest. This carseat is a breeze to adjust! The straps loosen to adjust so smoothly and tighten just as easily with the simple press of the lever. It was such a sigh of relief after having to fight with the Extend2Fit, and still not feeling like it was right.The manual says to be reclined all the way into the third position for rear facing, which was ridiculously easy just like everything else about this seat, so ignore the review that says "does not recline," because the "RECLINE" bar is bright red and says "RECLINE" and its right under babies feet.Anyways, the best part about this carseat is no more threading the straps at babys shoulders. There is a panel along the inside of the back of the seat that clicks up and down adjusting the height of the straps for you. It could not be any easier.The one thing I had to do was remove the gray flexible chest straps because my daughter is small at 20 pounds ( she is barely 18 months) and they prevented the straps from firmly fitting against her belly. The booklet said those were really more designed for when your child is forward facing anyways, as they are an extra shock absorbing safety feature in case of impact.This seat is incredibly simple to adjust, and as a mother I feel so much more confident knowing that my daughter will be secure in it. It was more expensive that the Extend2Fit but knowing what I know now I would have not even wasted time looking for a sale price on that one, and would have gotten this instead. Read more

My son is 1.5 years old and I have used the Britax Allegiance since day one with him, and now use it for my daughter.These car seats are super easy to install, and are extremely durable. I've used a Gracco car seat at the in-laws when we visited and compared to Britax it felt very cheaply made and not very sturdy at all.The only way that Britax could improve on this car seat is if they made it to recline at more of an angle for infants. When we brought the children home from the hospital they were dwarfed in the seat and because there was not enough of an angle they were almost sitting upright.Other than that these car seats are hreat. Read more

So excited about this carseat! Love the cushion behind the seatbelt buckle!! It was a breeze to install as well. Read more

Great chair does not recline Read more

We absolutely love our Britax car seats!! Easy to install, easy to use, our kids are comfy in them and we never worry about their safety when using these! They also fit easily into all of our vehicles from our small sedan to minivan! Read more

I own 5 britax car seats for my 6 grandchildren and will only buy this brand in the future. Hands down the most durable and safest car seats, I have ever bought. Read more

Not too bulky, fits in car perfectly and looks as described. I have had one other Britax and cannot say enough good things about the brand, amazing quality! Read more

Muy fácil de instalar con cinturón de seguridad, no requiere aditamentos adicionales.Cómodo para el bebé, la use para un bebé de menos de 2,500 grs, y resultó muy funcional Read more