Garmin put this GPS into their On Trail segment. Yet they are marketing it's use in ALL segments: Marine, Automotive and On Trial. The unit is of very little value in either the Marine or Automotive without maps. In the On Trail segment (650t) you can pay a premium for preinstalled-limited-Topo maps (save your money and buy US TOPO 24K map Regions) that will cause you grief trying to update them.
I'd like to see Garmin actually step up and reward customers who purchase a high-end device like the Montana 650 with Free Lifetime Maps (CNNA/CNEU) or a significant discount on US TOPO 24K maps.
Unfortunately, I don't ever expect that to be the case. Garmin only has programs like that for some mid-range nuvi units.