I have a 2014 Altima S w/ the 2.5 liter engine. I commute in this car 25 miles each way, 5-6 days a week. I always get at least 29 mpg. The 2.5 has plenty of get up and go and I prefer to use the Sport mode for the virtual gear shifts. The car is very responsive when you push it and driving is fun and very sporty. I have never seen the oil level drop between 5,000 mile changes and that impresses me due to the 0W-20W viscosity oils Nissan recommends.
I have had absolutely no problems with the car mechanically or electrically. The bluetooth works 99% of the time with my phone and I enjoy being able to listen to music on a USB drive, an MP3 disc, or off my phone. The only gripe is that I can't get the voice recognition feature to "fine-tune". The instructions do not work. As long as I remember to pronounce names the way the system wants me to, I'm fine. But, it truly is the only feature that doesn't work as well as it should.
I would recommend the leather if you have pets, as the fabric seats, while very comfortable, grab every stray hair and piece of lint that comes in contact with it.
Otherwise, I would buy this car again, even though I am not totally enamored with the looks.