Well the wife's Prius got a flat yesterday. I found the hole and put some Slime in the tire. It's holding air now.
Toyota no longer puts a spare tire in the Prius, but uses their own version of Ride-On. If it didn't work, I doubt they would risk their reputation by using it.
Chris
Don't fool yourself. Manufacturers are cutting costs wherever they can. Not including a spare tire saves them on design issues, weight issues and the cost of a wheel and tire.
But here's the kicker, which I quickly found on a Toyota forum. Seems their "solution" for your flat could end up costing you more anyway. It's all about them saving money and good luck to you!
"You either call the pre-paid towing service that Toyota supplies for couple of years, and be towed to the nearest Toyota dealer to get the tire repaired or replaced. Or you call your favorite auto club to get towed to your favorite tire dealer to fix or replace the tire. Toyota also provides an air pump that squirts sealing goop into the tire and ruins the pressure sensors ($$ to replace)."