That's interesting that Apple Maps caches a much larger area. That would be worth considering if the data is any good. A larger cache and faster rendering of crap data just means the crap stinks that much more. When Apple's data gets better, then this will be more awesome.

I've been getting around the "no network" issue by using the Garmin app anyways.

Unfortunately, the better integration of Apple's app is something I have not figured a work around. Other than getting an Android phone, I mean.