Anyone using Alpine NVE-N872A navigation?

[maxxx]

N872A nav users:

1) Has anyone driven across America, i.e. South to North or vice-versa? Were you ever prompted to put in a different disc? Or is it possible to drive from LA to Buffalo using the South disc only? or what happened and what did the unit do?

2) Has anyone driven from the area covered by the south disc, into Canada? What happened? what prompts etc.? was there continuous re-booting at one point?

3) Has anyone driven from the Canada into the US? What happened? what prompts etc.? was there continuous re-booting at one point?

I am in Canada and I use my NVE-872A with the "North" disc, and it is supposed to cover my trips through PA and NY seamlessly. However, when I am in the Western NY/PA/OH area the system continues to re-boot itself, making it practically useless. It recognizes destinations in PA/NY/etc. and offers points of interest etc., but re-boots even in the presence of strong Satellite coverage. Has this ever happened to anyone? Someone suggested to insert the "South" disc when I cross into NY, however the map that came with the disc indicates that NY should also be part of the North disc. I will not be going to the US for a while, so I cannot try-out the South disc as soon as I would like.

I've talked to some people at Alpine and got different answers because they do not have experience with it, so I'm asking here. Thanks in advance!