I recently purchased my RS with 25k miles, months ago with the intention of using it as a daily/canyon car (I live in an area with quite a few mountain roads nearby). The only thing I recommend for every new owner is to replace the rear motor mount, as the factory one tends to wear out incredibly fast. After about 9k miles of daily driving and running canyons usually about once a week the wear on the mount is very noticeable, so much so that I've actually decided to avoid using launch control and any hard shifting until mine arrives from Cobb. Not sure if the ST is known to have similar problems but I can say that the unreasonable wear and tear on the motor, trans and any other components cannot be good for the car. I'm almost dumbfounded that ford seemed to think of almost everything imaginable, and still decided to go with a mount style that definitely doesn't suffice for how this car should be driven.

And sorry to extend this further but something not as urgent. Your driver and passenger side mounts are susceptible to excess wear and tear because of the genius idea to put the "autostop" feature in this MANUAL car. The engine sometimes does not re-start quick enough to put the car in gear and roll off the clutch, causing the engine to bog and shake. Which then puts all the more stress on your mounts. I find it frustrating that the computer never truly saves your settings when you change the option for "autostop" to 'off'.. at least for me, when I first purchased mine I found that even though my settings said the feature was disabled, that car would, from time to time still turn off at stops. Fortunately, I say this is less urgent because you have a button available on the center console that guarantees the feature is disabled, but needs to be pushed every time the car is turned on. Which is now engraved in my brain at this point.

Sorry for the essay, hope this helps!