I found my first cache today with my N95 - took me to within a meter of the location and in woodland!
I'm new to gps so it took me a while to work out how to use it - to switch between N/S and W/E just press any number on the keypad to toggle.
To enter a postion as a landmark on he handset goto:
Menu > Tools > Landmarks - Then select Options > New Landmark > Enter manually
You can now enter name, cat, etc and scroll down to Latitude and Longitude (use # for the dot)
Once you have saved it the Landmark can be accessed via the Maps program (Menu > Maps) and the GPS Data app (Menu > Tools > GPS Data)
Hope the above helps those who need it,