 Run the numbers before making your decision.50 mpg is impressive, but the Prius costs several thousand dollars more than a comparably equipped gas-only vehicle(think Corolla).If you drive 15,000 miles per year, the difference in annual fuel costs between a car that gets 30mpg and a car that gets 50mpg is only $600/year @ $3/gallon, or $800/year at $4/gallon.You may never make up the cost difference.Power is acceptable (not great) when you punch "Power Mode", otherwise it is a road hazard.I always punch that button when driving from a stoplight or getting on the highway, and turn it off when I am up to speed.