 Bought brand new and a short review after owning for 85K miles.  Major mechanical items (engine, transmission, etc.) have been reliable.  As others have noted, the transmission is sluggish/underpowered, constant issue/recalls with passenger side airbag, and the gas mileage is horrible - we average about 17 MPG in the city and 19/20 highway.  Key concerns:  1. Replaced battery 4 times in 5 years with terminals connectors having been replaced twice, 2. Door mouldings routinely come apart making car noisy with lots of squeaks, 3. Driver and passenger visors repeatedly break ($200 each to replace at dealer) due to cheap parts, 4. Tiny driver kickplate led to hole in interior floor carpet and the dealer wanted $1,100 to repair, 5.  Brakes have short lifespan 25k to 30k and need replaced; dealer quotes $375 for front pads - outrageous.   6. Terrible dealer support/lack of warranty support - Infiniti of Scottsdale, AZ is the worst.  The service "advisors" almost appeared to be gleeful as they told us repeatedly that another issue with the vehicle was not covered under warranty during the supposed 4 year/60K warranty period.    All said, this is truly not a luxury vehicle - just buy the Pathfinder and save $10k-$15K.  Or, if you truly want a reliable "luxury" vehicle go with Lexus or maybe Acura.   NOT IMPRESSED WITH THE INFINITI JX35.