The back seat is usable. I got rid of my 2005 G35 Coupe 6MT for the SRT6. It was a nice car, but unfortunately it and many others have oil consumption issues. I had 10,000 miles on mine and it was using more than a quart of oil for every 800 miles or so. The dealership did the prescribed oil consumption test and concluded there was a problem. Nissan came back and said that they are aware of the problem and are working towards a fix. Not sure how long that will take, but I didn't want to wait. I didn't feel like carrying a box of oil around in a car that I bought brand new for almost 40 grand. I know at least 15 others who have already had their engines changed. Check out the forums at
www.g35driver.com. Just search for oil consumption. Lucky for you, most of the problems are with the RevUp VQ engines in the 6 speed cars. They are the only ones with the higher performance 298 hp engines. The automatics have the 280 hp version. Good luck, keep checking the oil!!