I have a Garmin, but suppose they're pretty much alike. Never leave home without it, even if I think I know the way.
Used it extensively in Maine, Florida and western NC recently. Helps find points of interest, restaurants, sporting goods stores
,fillin' stations and just about anything you may need.
Where they "get you" is the "yearly updates", when they offer to upgrade the software for a "fee". I don't do that every year as I figure not much could change, but do it like every 3 years.
Before making a trip we load up the GPS with evry place we may visit. Better to do it beforehand, imho, than when you get on the road. You can always delete whatever you don't need.
Hope this helps somewhat.