I use the buttons and swipe probably around 50/50. I don't use my fingers much to point on the screen or swipe. I keep q-tips scattered around to use for that. Just a very gently touch (not even actually touch the screen sometimes, the sensors pick up anyway) and the page is turned.
(I bought a pack of nice purple q-tips for pennies to match the reader. One have to think of ones appearence, right?! Actually, the 350 is so much hotter than I am, so if it was human it probably wouldn't be seen in public with me.

)