L.B.
I bought the Radian 80 because I thought it would be easier to take on a plane. Here's the scoop. It doesn't fold that easily so you have to practice. It is VERY heavy so it will not be easy to carry. I'm even thinking about getting a rolly cart because I don't want to carry it along with all my other stuff. Therefore I may as well have gotten a regular seat with a better rating. I could just as easily roll a non-folding seat. Also, if you check out the website www.nhtsa.gov then click "child seat ease of use ratings" (on left), then click "ratings summary" (on the right) you will see that this seat got only 2 stars. Unfortunately, I looked here AFTER I had already bought the seat. You can probably find a seat with a better rating on that sight. If you are buying the radian 80 for convenience, I would recommend against it. Good luck!
ps I would never tell my husband this since he already shelled out $250...oops!