I don't find GPS accurate enough for turn by turn; I've used several platforms, and it's always accurate to about 15 to 30 feet in the real world. I find the best solution is Blindsquare on IOS. Don't bother with turn by turn, just track your destination. Blindsquare will tell you what direction you're going, how fast, what street is coming up, and nearby landmarks. This works really well to keep you oriented, help know if you're walking the right way, got the right bus, etc.

The Trekker Breeze has a subpar GPS chip in its current form. The refreshed model, the Breeze Plus, which is coming out soon will supposedly remedy this. That being said, you won't get better results using a Breeze vs. apps on your phone. I use a GPS often, and it's great to let me know what street I'm on or the names of upcoming streets or businesses. It's no replacement for good cane/dog skills however, and you'll still need to do a bit of guessing to find what you're looking for, especially at the end. Use GPS as a tool, but trust your instincts and judgment over what any phone or computer is telling you.

Don't waste your money. It's basically a google maps. My GF uses trekker and it too ahs its good and bad days. It's not worth the money IMO considering any GPS you can get for the Iphone does the same thing.

I was part of a trail group for the trekker breeze about four years ago, we basically got to take it around town for a couple of hours and then gave our thoughts on it. Honestly, I would say that if you are comfortable with Google Maps then there is no point in changing - from memory I can not remember any significant difference between the two apart from the obvious lack of a screen on the trekker breeze.