Consumer reports doesn't like the Infiniti infotainment system. They think it's too complicated, and reduced the overall "reliability" of the vehicle as a result. The JX35 had an old-gen tranny that worked well. The 1st year QX60 had a new-gen tranny that had problems (search this forum), but those problems have since been worked out.
If you like the vehicle, then get it. Mine has 100K, and I'm still enjoying it. I picked Infiniti over the German brands (quality concerns), didn't like the Acura offering, and Lexus didn't have anything that didn't look strange.