I have a Milestone running Android 2.1 I am undecided between buying the European maps for Motonav or a similar GPS navigation app for Android, and instead buying a dedicated GPS navigator (Tom Tom, Garmin etc). I'd use it mainly abroad, so I need the Milestone to work as a GPS without a data connection (or roaming charges will kill me). I guess it can, but my main question is whether the Milestone GPS is accurate enough, or if it may be better to spend a few more pounds and buy a dedicated Tom Tom or equivalent. What do you think? Have you ever tried? Can a smartphone ever substitute a dedicated GPS navigation system? Thanks!