Skeptics likely fall into the "this cannot be true" category. Very impressive reviews overall. Though there is a bit of "are they over promising?".
Excerpted from Lawrence Ulrich on The drive:
“Rather than bringing Tesla closer to the goal of the Model III, the Model X may be a 2.5-ton warning sign that the company is either unwilling or unable to pull it off. The Model X’s prohibitively expensive technology, including its low-volume aluminum construction, batteries and propulsion system, is virtually identical to that of the Model S. In other words: The Model X may hold seven passengers, but its technology and price hold no evidence that Tesla has realized critical economies of scale in design, materials and manufacturing. Or, a technical breakthrough that would reduce the enormous cost and mass of its batteries. So Tesla appears no closer to its promise of bringing affordable electric cars to the masses."
Source: Automotive News