One word...WOW!
Everything about the car is great. The power under the right foot is always there, youjust have to be ready for a bit of torque steer if youshut off the VDC. If you get a auto make sure you use the manual mode often. I like to get up to speed in "D" then shift over to 6th gear to hold the gas mileage as high as possible.

The navigation system is sopt on. I try to confuse the system to see if it will really find the fastest way to locations I already know. The only thing I wish it had was "arrival ime to final destination" function.

The Bose is really the way to go. I use XM and never have problems with a good signal unless the sky really is blocked. I wish someone would make a IPod holder for the aux plug. as it is you have to have a cord from your armrest to the dash, which just does not look right in a $35K auto.

When my lease is up I will be looking for a new Alti.

The 3.5 SE with CVT is a very sporty front-wheel drive sedan.  It is excellent in long drives and gets decent gas mileage (up to 31mpg on highway).  One downside is that if you want to push it hard, it likes premium gas.  If you don't drive it hard, then 87 works fine.  
My biggest complaint is about the stock tires.  They are not as good as I hoped in snow/rain.  Also, they are not very good performance tires.  I plan to replace them once they're worn and get something better.  09 Altima's come with different stock tires, which would address this.  
The car has an amazing chassis.  It loves twisty roads and highways.  I would say it is by far the best front-wheel drive car that I've ever driven.
The CVT is amazingly smooth and provides instant power whenever you need it.  However no-transmission can read your mind.  Fortunately, it can be shifted manually as well.  The response is instant.  
This is a car for the person who does a lot of driving and likes to enjoy themself behind the wheel.  It is much easier to live with than its sportier competitors and makes for a great every-day driver.    

i just have purchase a 3.5se m6 2007 the engine is good the travel of the shifter is too long the car understeer a lot on acceleration .....
id rather drive my honda prelude.....good space ....very comfortable
large thrunk...and good gaz millage for a 270hp engine