 Navigation system interface is VERY unattractive and not very user-friendly. Fuel economy is a foreign concept to FX50. The ride is bumpy and uncomfortable. There is no off-road capability. The worst aspect of ownership is having to deal with Infiniti. The service is very poor. They don't even provide loaner cars when needed. Infiniti Customer Service proved useless. At this point, I would go with Lexus. Supposedly their Customer Service is unparalleled. I strongly advise against Infiniti as a brand.