It has potential. A lot of potential. I'm excited to see one. The manual is online.
http://download.gracobaby.com/ProductInstructionManuals/PD163434A.pdf
Some things that popped out.
You have to have the headrest in the bottom three (of six) positions for rear facing. The height for rear facing is 1" from the headrest, NOT the shell, but still. The top slots for rear facing then are just shy of 12". Forward facing you must use positions four through six. However, in booster mode, three through six are acceptable.
In booster mode, the base is not used, and the seat must sit 100% on the car's seat.
The harness doesn't have to be removed for booster mode, but it must be stored.
There is a 10 year expiration from DOM, not December of the 10th year. This means get ready to see 2020 and 2021 expiration dates starting for seats made next month (the Frontier 85, the Nautilus backless, and now this).
This seat is NOT FAA approved in any mode.
The harness covers must come off at 40 pounds.
The infant padding can be used rear facing only. No restriction on harness height like on the Nautilus.
There are multiple reclines for rear facing, though forward facing over 40 pounds you must use position 1.
In the manual Graco states that children should rear face as long as possible, and harness to the maximum.
All in all, I'm highly impressed. I can't wait to get my hands on one. For $300 for potentially the only seat you'd need from birth to seatbelt (unless you fly at all), it's not bad at all. It looks super easy to adjust, install, and use.
Wendy