The Nissan brand don't fit that snuggly based on pics I've seen and comments from other members.
They even look bagging in the promo pics.
I'd recommend Cover King - better fit, and I think the price was about the same.
http://www.coverking.com/customseatcovers.html A lot of people here recommend Wet Okley (spelling?) too - but they are a little more expensive.
Search the Accessories section - there's tons of info and pics of the Cover King ones.
If you go with Cover King, consider ordering through Costco.com - even if you aren't a member it seems to be the best price around