Just acquired the Montana 650 last week and aside from the crashes related to the POI alert (which was fixed by the Sept. 2 update), the only problem now was the crashes when browsing the Photos for navigation. It only happened twice but I fear that this was the same problem I have encountered on my Oregon 550.
Overall, I am satisfied with the performance. The huge screen is a blessing! and I don't mind the weight either. I hope Garmin will make accessories (especially hard case) for the Montana and not just some over sized and recycled case meant for their old units.
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