I have a couple stand alone units...they don't get used any more, they just sit in the glovebox. If you have a smartphone either invest in a mount for it and keep it charging while you drive, if you don't have a smartphone, get one and count it as part of the $$ you would have spent on a stand alone GPS.

google maps on my phones is 10 times better, automatically updates with all the latest and greatest info, has traffic etc.

for hunting I have a gamin which topo maps and the like.