Actually, the spot outside my garage rarely picks up more than six sats. I've been using GPSs since they first came out and found them to be a useful but inaccurate tool that always needed a map. Back in the olden days I used to take a fix every ten minutes when out bush. I used to amazed at the difference between fixes. Errors used to be in the order of 500 metres. I always used to triangulate off several fixes but found it easier to dead reckon as well.
Then I bought my second GPS and was impressed how it was able to give altitude and a better fix on position. With the altitude accurate to a few hundred feet I was able to better fix my position in mountainous terrain.
This latest GPS has got a fair background map, accurate to about 500 metres. The beauty of this model is that it give you an accurate indication of accuracy based on sats and signal. For it's pitfalls, I still love using my GPS.