I have the Graco Argos (newer version of the Nautilus) that I bought about 6 months ago to replace the MyRide65 that DD was in. I loved the MyRide, we never really used it rear facing though. The condition was great, all the reviews I read pointed to this seat as a mid-range ($ wise) best buy. We bought one for each vehicle since at the time we drove DH's truck on the weekend, but I did pickup and drop-off in in my Civic during the week. We traded in the Civic for an Acadia at the end of the year and the MyRide sat up so tall in the seat that she couldn't climb up in it on her own (captain's chairs) so when I would put her in the seat I would hit her head all the time... I wanted to look for a new convertible booster anyway, so that's when we switched to the Argos. I had a coupon and got it for the same price as the Nautilus so I figured I would get the newest model and I love the seat. She really likes it- I will say the main 'button' to undo the harness is really tight, and the straps are also really tight (almost like they need to be broken in but I've been using the seat since March). I'm thinking of taking off the 5-point harness and using the lap belt with the seat (still with the back on the booster).
Another option, depending on how old/big your DD is, is the Turboback booster from Graco- now we take my car everywhere so we got the highback booster for DH's truck the few times he picks up during the week. It's normally $50, but on sale at Target through tomorrow for $30. I bought one for my mom as well since she is still strapping DD into the Cosco Scenera from two years ago. (Nothing wrong with that seat- I bought it for both sets of grandparents to replace the used infant carseats they had purchased/borrowed when DD was born. Best safety ratings in it's class)