yesterday i have time in toyata grage in sweden to change spark plug and gear CVT oil they make it in one houre i be serprised i see many video the talk take like 2 hours and when i get the car they donot open all thinks like the video they tack about 150 us dollar for that but i buy spark plug and 5 liter gear oil.
The price doesn't sound bad for here in the US. Are you happy? The original spark plugs aren't cheap and four quarts of WS transmission fluid were over $8 a quart several years ago mean they didn't charge you that much for labor.
Plugs can be done in an hour on a Gen3 . The windshield wiper cowling comes off and can be installed in 15 minutes with the right tools. Plugs are easily accessible once the cowl is off.