Personally I liked their older model - a map and nav service that lived entirely on the handset. You could take the whole world with you, which is very useful in some of the more remote areas (like parts of Australia).
I believe here.net works also in offline mode with HTML5 local storage, at least the old Nokia maps version did. Maybe the 'collections' feature stores the actual data on your phone.
...and on all of the Symbian^3 crowd of phones as well. Quite a lifesaver when travelling around Europe and not wanting to get gouged on roaming data charges.
