If you have a smartphone, then before buying a standalone GPS, spend a whole lot less money for a very functional app such as GaiaGPS or Backcountry Navigator. Spend a little time with whichever you choose to get to know how it works, to include making sure you try it out in areas well beyond cell tower reception.

I own a standalone GPS and in some cases find it worth carrying but for the most part I'm happy with my smartphone for occasional GPS use.