LoL, Just saw the part that said,If you're not going to tip? Who in the world isn't tipping...We end up tipping 20% minimum & sometimes more, but if someone decided to tip 15% you couldn't blame them..That would be like 5% cash back in their pocket...Tipping $0 would be outright outrageous..No?
With the TIW tip is automatically included. So you tip, but you don't have to add the tip.
And the tip amount added is 18%. So if you would normally tip 15% you are tipping a little high. For us, we normally tip 20%, so we "save" money with the tip included (we will add more for exceptional service - and last trip we had some pretty exceptional service - but we don't bother to go from 18 to 20% unless there is a reason).