There are several indications for such as the appearance of new models 530.720 and 750 support which a TMC module newer generation and clutter free as in 550.
The supplied by Navman TMC kit does not work in Austria and when attached to the windshield (antenna) no eye candy.
My conclusion about the device: one renounces TMC and purchased it without, you have a very good reliable navigation system with integrated hard disk and current map material from almost all of Europe.
Stylus to operate without finger is included here, which keeps the Bilschirm clean and grease free, but you should still get an anti-glare screen protector.
Battery life is sufficient price - performance is fine