Lexus says that the HS 250h the world's first hybrid-only vehicle, achieving 80-percent better city mileage (35 mpg combined) than the average near-luxury car. Safety is also a focus of the new HS; it features a total of ten airbags and class-leading accident-avoidance features. The HS 250h performs comparably to other full-hybrid vehicles, but it does have an unbeatable feature set. Standard features are very generous, but some exciting technology is optional, such as Lane-Keep Assist and the Heads-Up Display.