Hi,
I like very much customization option in Forerunner 305. It is easy to setup, you can choose from one to four values on screen and each is configurable. All profile or standard parameters can be choose as value. Check on picture how I organize three screens that are available for configuration. Also other features are very useful like Auto pause, Auto lap etc.
After two runs I’m very satisfied with accuracy, it is between 5-9m, don’t expect centimeters 
. It is easy to link route/run with Garmin maps or Google Earth. Virtual partner is great feature, you are running against your best time on course. It can motivate you after many runs on same courses.
