I've been through several Garmin E-trex units over the past 10 years or so. The performance was good. The accuracy was good. They are truly pocket sized. The price
was usually just over $100 for the yellow ones if you shopped around a little. The blue ones were usually about $30 more.
The blue ones came with basic highway maps & coastal buoys & I think a little more memory for additional maps &/or way points. The yellow ones just gave you a blank screen
to start with, but would track a breadcrumb trail just like the blue ones & did hold at least 100 way points. There were also a bunch of extra functions that I never really used like moon phase, calendar & I don't remember what all else.
They all worked well for a year or two, then some connections inside, that go to the display, got decrepit & the screens started to blank out. When they get in that condition, you can bend the cases a little to get them to work again as an emergency
measure, but once that starts to become necessary, I always considered it time to start shopping
for a new one. The other thing that often got decrepit over time was the little toggle button on the front of them.
My units all led a pretty hard life physically. I traveled with them extensively & they often lived in the front pocket of a pair of jeans along with a ring of keys. When I leaned up against things, it probably wasn't very good for them.
As was said before, a pair of AA batteries were good for over 12 hours if you used alkalines. I got more like 8 hours out of rechargeable batteries. I also have an adapter that lets me plug
into a cigarette lighter outlet for external power.
They all give you a few different screens to choose from, like compass heading, map field, statistics, etc.
The E-trex version that I have is now discontinued & I see that Garmin now has a new case style out to replace it. Hopefully the new version will hold up longer under the kind of abuse that I give them. I'll probably find out in a year or two. I plan to stick with them.
The E-trex units can all be hooked up to a computer with Garmin Mapsource software
. The really old ones used a DB9 serial
connection. The newer ones use USB. Different versions of Mapsource had different maps included. Some were road maps. Some were topo maps. Some were ocean maps. All that I used communicated equally well with the individual units.
This looks like the out-of-production yellow one that I had, except that this one has maps on it - http://www.newegg.com/Product/Produc...9SIA19P0AZ4778
This is the modern version of the yellow one. This is the one that I have not tried yet - http://www.forestry-suppliers.com/pr...m=39470&shop=2