I've tried:

• Window Suction Cup Mount Thingy

  • Pro: great visibility
  • Con: Sucks in hot weather
  • Disposition: was eventually thrown with great force into the back seat

• Sticky/Vent Mount Thingy

  • Pro: excellent idea
  • Pro: great visibility
  • Pro: very stable
  • Con: sticky thingy fell off after first use
  • Con: couldn't get quite right angle for the vent mount
  • Disposition: Junk drawer

• CD Mount Thingy

  • Pro: very stable
  • Con: Covers up touchscreen/rear view cam
  • Con: No CD access
  • Disposition: Glove box -- just in case

• Tray Mount Thingy

  • Pro: stays put
  • Pro: excellent visibility
  • Con: ??? -- maybe limited in where you can put it?
  • Disposition: currently in use; seems to be the best solution so far