If you want a good car with good track record, great mileage and reliability, and you don't mind spending more for the privilege, this is an excellent car.
Overall the Prius has been an excellent vehicle, generally reliable and efficient and definitely good mileage. With regular maintenance, you can expect to go well over 100,000 miles before more serious repairs are needed, which is good for a small car. I put the first 100,000 miles in the first 4 years, and have only needed major repairs on the A/C ( evaporator core, not the compressor ) when it was about 7.5 years old, and ~130,000 miles, which apparently is not unusual for small cars. Thanks next major repair was the ABS and braking system which had to be rebuilt/replaced at about 9 years, and ~160,000 miles. Mileage after 10 years is not what it used to be, ( averages more like 30 to 40 mpg these days instead of the original 40 to 50 ) which is also not surprising due to the age of the hybrid battery system mainly.