<https://forums.geocaching.com/GC/index.php?/topic/181962-gps-what-to-consider-when-buying/#comment-3250285>
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"Connectivity to the computer is a must. And, I highly recommend that be with USB, instead of with the Serial Port.    \nColor is very nice because it is much easier to read.    \nA mapping unit, with maps installed, is recommended because it gives you some additional guidance for getting to the cache.    \nA GPS unit that can auto-route you to the cache is a real time, and gas saver.  \n \nIf you start with a basic unit, you might find yourself wanting to upgrade within a few months, which means spending more money. That is what happened to me . . .  \n"
<https://forums.geocaching.com/GC/index.php?/topic/181962-gps-what-to-consider-when-buying/#comment-3248953>