As far as I am concerned, reasonable price or not, you buy a sat nav to tell you where to go, not to wake up when you are there to confirm you got there!

I decided to recently purchase the Navman iCN 520, as the unit was now on sale for £169.99, which in my opinion is a bargain, compared to other units on sale for over £200.
The 520 is to replace my ICN 320. However I have found various glitches with the 520, namely; the software froze when the unit was first switched on, and displayed a syntax error when loading map information, forcing a hard reset.
It also has trouble at times holding on to GPS signals, again I found this strange as my 320 never loses a GPS signal, even in the same locations.
Searched the web for a free safety camera add-on, as is advertised, but to no avail, as one site I have found wants a subscription payment, before I can download the required software.
I am looking forward to giving the 520 a good trial soon, on a long journey, to see how accurate it directs me to my destination.

The Navman iCN 520 is a slim unit making it ideal to remove from car and carry on your person, major reason for the purchase due to locations of work. I use the unit in the West Yorkshire region and on numerous occasions it has not been able to find address, gets confused when in small villages with regards to one way systems and dirt tracks. I have spoke to Navman direct and they explained that it has only 95% coverage and they are constantly updating.

Funny thing to say that I was driving in an estate built over a lake that had been drained 20 years ago. Takes the usual 10 minutes to locate, crashes, so needs constantly resetting.

Bought the unit in September 2005 and by March 2006, it was selling for £150 cheaper. I'm under the impression Navman is aware of the unit's fantastic capabilities.

I used this Navman iCN 520 for about a year until it was stolen. I chose it because it provided all core functionality at significantly lower price. Because I paid less I was quite prepared for minor problems and on the whole "its been good while it lasted". However the design seems to suffer from some flaws: (1) There are clearly some problems with how [not] sensitive the GPS receiver is - it takes a while to pick up a signal at the beginning of the journey and I found my device was prone to loosing the signal (although for relatively short periods of time) in built up areas. (2) The volume of vocal guidance is a bit too low. (3) The device sometimes pics up peculiar routes (I found no rational explanation) but this is more puzzling than even an inconvenience - the routes are still OK. (4) The screen is not very clear in bright sunlight. (5) I had some problems entering non-standard destinations (e.g. involving motorways rather than streets).

However, I was happy to tolerate all this for the difference in price and if it wasn't stolen I wouldn't replace it.

However, I found it more and more inconvenient that you cannot buy maps of individual cities on the continent / USA and found the price and service surrounding new maps purchase "prohibitive" and unintuitive/confusing (the easiest way to buy new maps seems to be eBay - not manufacturer's website). I travel a lot for work and I don't want to pay extra for SatNav each time I rent a car while I have one sitting at home idle. So, I decided to try TomTom One instead now - when it gets stolen I will write a new review :)

I live in south of london, other sat nav get quick signals in my area. The Navman iCN 520 always takes time and sometimes 15 min. Plus maps is out dated. Believe it or not it doesn't reconize my own house address. I feel it should be attach another sat nav to guide it and let it work.