Future maps / updates and cost.
All the free OSM apps are free upgrades, I bet you anything theirs could be free if they wanted.
But of course if they work to improve detail, poi, corrections etc, then updates should have a cost, only fair.
Auto routing is no big deal for offroading Rob.
Most don't do it because it's too hard compared to city routes etc.
Besides, most of the time you just use it like a paper map, only with the bonus is the moving map part your location shown on it as you move along.
Most people know where they're going, all they need is to see tracks to get there and follow them, it's a no brainer really.
No doubt you can plot a route like hema ?
Very easy to create a route if you want, and it doesn't have to be spot on, just used as a guide.
Good to be able to track routes and have files to use again / send to others.
The maps do look good, and with decent detail, if the VHC is the same it would be a very good $99 system for i-device users.