After a week or so of navigating with the new UI on N900:

It is amazing how the app is stable comparing to android version.
Seems that most of the UI issues have been treated.
thing that still have to be take care:
- App start with small resolution - turning the phone twice (portrait-->landscape) solved it.
- Map blinking - not all the app, just the map.
- I think fix ETA time is nessecery, but i'm not the only user.

I hope U'll have time to deal with it.