Well I have an unusual perspective. People who have never driven an EV are wowed by that aspect of the Model S, but I've been driving them since 2008. I drive my roadster every day (that I'm in NZ) but the Model S is such a step up there's barely a comparison. It's
almost as quick, but not nearly as nimble. But that's understandable considering the weight.
What the Model S does is meld an EV drivetrain with a nice interior (not
Lexus nice, but in the ballpark). So driving an EV is suddenly less of the compromise that the Roadster is. The car is big, both long and wide. And that size is reflected in the interior, which feels cavernous. I felt guilty driving it through tiny London streets with only 1 passenger. Of course all that room is important when you're carrying six other people.
What I've been most impressed by is the cohesive user interface design, everything from the settings screens to the satnav. A lot of work has gone into aspects of the design that are unrelated to the nature of the drivetrain, and it just shows what happens when you throw smart Silicon Valley techs at traditional car problems.
Here's a very blurry shot of the dash screen, showing the level of integration. In this instance, the satnav: