Smaller engines, reduced aero and heavier cars. It doesn't sound like a recipe for a great Formula 1, but there's more to it than that.
The torque of the 1.6-litre turbos and the increased power from the regenerative systems means the 2014 cars are a handful. And fun, according to some of the drivers.
AUTOSPORT has gathered together the thoughts and feelings of some of those who have given the cars their first on-track miles at Jerez this week, tackling the main themes that have developed so far.