I've been using the c310x for 6 months and its great. I've found 58 geocaches so far using it with little problems, however lately as I venture further into the woods for them I have been getting quite nervous about its durability. I have been looking at a 60CSx or Cx as my geocaching GPSr so I can leave the c310x safe and sound in the car. For directions though, it is amazing. I use it for work all the time instead of a map book.