Perhaps I can clarify my point...I understand very well what is GS and what is IS. Those are two different category of vehicles. IS is in category if BMW 3, Audi 4, not 5 series or E class like GS is.
Driver of IS is not going to look at battery charge before turns on stereo.
I am not talking about the category of cars. The GS is a great driver's car; the IS is not.
That's why I suggested driving both cars. I find our old Acura TSX a far better driver's car vs. the new IS.
I find the new (refreshed) IS disappointing.
Of course the GS is no more. Our '13 GS350 F Sport is a great car.