Ran it for around 7 hours and 300 kms today on my N82.
Changed between track(SS stages) and performance testing every now and then.
Seems like a good and stable version.
The only problem I had was when I switched from one SS to another SS it couldn't restart the gps.
But this only happened once and its not sure it have anything to do with your program.
I couldn't notice much, if any quality difference between the integrated gps in my N82, vs what I have logged before with my Tomtom Sirif3 BT receiver.
The line it draw didn't differ from the old ones, and the color of the satellites looked the same.