[quote="dgm"]
The short answer is that you can have a full postcode search on an E53 but only if you get a counterfeit disc. Even at that it's a slow, clunky method and really isn't worth it.
You can still do a partial postcode search with a genuine disc though, the option is obvious on the menu.
[/quote]
i think it works very well, if you can put up with the million step process to enter a post code.. so much so that i actually got rid of the tommy i had because i found that i wasn't using it at all.
my mrs on the other hand hates the totally non-user friendly million step process that she refuses to use it! doesn't hesitate to show her annoyance and proceeds to borrow a tommy from a friend, in the rare occasion that she has to drive alone to an unknown location.. or uses google navigator on her phone!
guess u can gauge how user friendly it is

Current: BMW 640i Convertible (320PS)
Audi A7 Sportback 3.0 T FSI quattro (300 PS) SE STronic

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