mjr wrote:.....(Although I don't understand the attraction of Etrex over OsmAnd~ using Cyclestreets GPX routes and spoken directions on an android device...)
Device use and interaction depends on your intended use and circumstances.
For me, for camping touring exceeding a week, I mainly use a map for general riding navigation, the Etrex for routing through large cities and finding specific locations, and the Tablet for leisure, internet and detailed leisurely route dreaming at night 'cause the paper maps I use are either too large scale or tourist stuff...
But then I meander, or dander along and adapt the route as I go along..
Other people will be different.