I've just ordered one of these 'enhanced' GPS units from Lezyne and can't wait to try it out. The functionality seems perfect for my type of riding, as I plan in RWGPS and the turn by turn will be quite adequate for navigating. I do hope they develop the mapping feature but for $150 it's tough to see anything else filling this niche especially with the battery life and type of charging system. Garmins are just too wonky with file transfers and stuff - probably the higher end ones are easier but for the money I'm stoked to try this.
Anybody actually used the 'Enhanced Super GPS' to navigate some rides? Curious, as reviews are pretty limited on the interwebs.