Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

I have had this unit and used it for a couple of years now. the reason that I bought it was its portability and I could use it both in the car or have it with me when I am walking. So, from that aspect, it is very nice. now every positive normally comes with a few negatives. as you may guess, due to the size of this unit, the receiver is probably not the most powerful or accurate receiver, so you need to learn how to cope with these aspects of it. I have had cases where the receiver got confused when I was in the city (San Francisco) with a couple of tall buildings around or when I was driving around on windy roads in Sierra. But other than that it has worked fine for me and I have used it in town and country. I found another navigation SW for it that I think is nicer and performs better than the one that came with it from HP. (...) mine is an MMCX.
Positive