Navman’s MiVue series

[Shurike]

Hi everyone. What is your experience with Navman’s MiVue series? I haven't seen it much discussed in the forum, but it seems to be one of the only ones sold in the main stores (Harvey Norman, JB HiFi, etc). The reviews seem to vary a lot. Apart from what looks like a bad window mount - would you recommend it?
Looking at either Mivue 530 or Mivue 580 (if it's worth the extra $100)

Thank you

 

[jokiin]

there's a couple of references to Navman models in this thread http://forums.whirlpool.net.au/archive/2350906