Originally Posted by marsupial-mom
Because the infant seats that have a base and removable seat, they have two places were the seat can detach from the car. That means there are more points of failure. That worries me. We chose a convertible for that reason. Our son was tiny in it when we first brought him home from the hospital but he was safe.
This is an important factor. So even with what I said above, it would make more sense to get an infant seat if you have a small car (like the one I have). Otherwise, in trying to make room for the proper angle, you can end up with a very uncomfotable seat position for the front seats.
I can definitely see the convenience factor of the seats that detach. And they say that the most important thing is to choose a carseat that you will use correctly, despite any other issues. So by all means, just choose whatever suits you and your life!
Car seats are rigorously tested against failure, so I think its inaccurate to say that since the car seat detaches, there is a higher rate of failure. It's simply factually not true. All car seats are subject to human error, and can fail based on your ability to install it correctly and strap the kid in. Leading people to believe that infant seats have "more points of failure" isn't any more true than convertible seats have any less.
The advantage to an infant seat is that if you're going to have a small baby, there's a larger amount of seats that are compatible for small babies. There are convertibles that fit newborns well, as Maedze said, but if you were going to do it I wouldn't suggest the Radian. That seat is very long and having it at 45 degrees will take up a massive amount of space in your car. Radians are great seats and are great for their longevity, but if you want a Radian in the long run, I'd start with an infant seat for the period where you need it totally reclined. There are other seats that fit newborns really well and don't take up a ton of room, if you do decide to go that route. The Combi Coccoro fits babies 3lbs-33lbs RF, and the way it's designed allows the seat to be rather upright because the incline is done on the inside of the seat's construction. It should last you 2 years and then you'd have to get a larger seat to RF, but it wouldn't have to be at 45 degrees.
I personally like an infant seat. They fit little babies well. It's nice not to have to wake up sleeping babies to go grocery shopping, run out to friends' houses, etc. I also loved the infant seat for going out to restaurants and having somewhere to put the baby while you eat. If you get a convertible seat, you'll be babywearing a lot, which might be great, but you also might hate it. If you buy an infant seat, you'll at least have the option of carrying the baby in the seat if the occasion is right.