For reference, I've got a Belkin F8T051 which is stellar -- in the Manhattan canyons, or stuck under a Brooklyn EL -- it locks in just seconds. I got it off e-bay a few years ago; I'd be surprised if I paid as much as $45 for it.

Took me about 3 months to get my first lock on the N810 -- finally, after deleting nvd_data, facing south, under clear sky, and killing a chicken, I got a lock in a few minutes. Just leaning back on my terrace, though is enough to send it hunting again. I used MM to track a bus ride down 14th street - it was comical, looked like a drunken sailor going home. It had me wandering from 15th to 12th streets. Even a walk through Chinatown looks like I've been crossing the street multiple times (when it doesn't have me walking through buildings).

I think the A-GPS is just a placebo to keep us distracted until the warranties run out. It's never done any discernable good for me. I think the GPS chip is just a POC. I'm glad I held on to my Belkin GPS.

The N810 is laughable as a real navigating device -- my wife usually has the foresight to print out a mapquest page so we're not totally hosed.