They had it when I went to BBB back in September. I loved it. And I'm generally not a fan of Dorel seats. The head wings are very nice and the seat itself isn't that heavy compared to other seats with the same specs. What I loved the most was how deep it was. I didn't have a baby to put in it obviously...just my insane two year old that was busy making the stroller section look like a baby traffic jam, but compared to the keyfit and snugrides, the sides all around the body were awesome. I really liked the feeling of an all around side protection vs just the head. Like I said, I didn't have an infant to place in it, but compared to the other infant seats it definitely had more of a feeling of placing your baby "down into" vs just "into" if that makes any sense, and I really liked that.
The canopy is really nice and I like the feel of the fabric although I think it might fuzz easily.
I have no clue what's up with the boot. It's not thick or big enough to do anything...it's like putting a strip of spandex above your baby's legs, lol. And I have no clue what's up with the rubber strip running around the outside of the seat. It's slightly floppy and I think would bug me.
The base was nice and the seat clicked on and off it very easily.
I actually didn't like the Aton so I may be in the minority here...haha. I played with it in the store but it was difficult for me to adjust/take off and on the base and just didn't really have any features that stood out to me I guess.