Thumbs down for Britax!!! But honestly, I think people had their hopes set too high for this seat.
When they showed the pic with the stats and it was bigger than the MA, people immediately began comparing it to the Regent. But there really isn't a seat out there that can compare to the Regent. We do this every time a seat comes out. It happened to the Apex, it happened to the Recaros, it happened to the Radian, it's happening to the Nautilus & Frontier.
This is NOT the seat to be looking at after your kid outgrows the MA. It's the seat you look at when they're outgrowing the RA or another low top slot seat. That said...I will most likely try for the Frontier when DS goes FF, with the Nautilus as a secondary/backup.