I drive a 3rd gen Prius; DH drives a 2nd gen. As Oakleaf says, racks will eat your gas mileage. Wind tunnel testing doesn't just apply to cyclists.

We used the Saris bones without issue (well, except the 10% hit on gas mileage) for quite a while when we transported 2 bikes. Then we met a couple putting two bikes into the back of their Prius at a ride and watched them stack the bikes. It is quite doable and goes pretty quick.

That said, we discovered one major disadvantage of the Prius now that we're full-time bike commuters. The Prius is an electronic vehicle and it is always "on" looking for you to come back, open the doors and start it up. All that electronics is driven by the itty-bitty battery in the trunk.

The little battery also needs enough juice to start up all of the computerized components. Once the electronics are on, the big batteries take over. However, if you don't drive the car for a while, the little battery goes dead. And, despite having the big battery array, your car won't start.

Since we can go 2-3 weeks without driving either car in the summer, we've learned to trickle charge the cars and now keep a schedule as to which went out last so we reduce the problem.

But, really, it is a nice car. And your bike will fit in the hatch just fine.