Unfortunately there is news that some Tom-Tom Sat-Nav devices are freezing and refusing to start a journey. No answers or permanent fixes yet.

http://www.bbc.com/news/technology-17599701

TomTom has blamed a "leap year bug" for a fault which has caused some of its satellite navigation devices to stop working.
The firm said that a problem with its global positioning system firmware was causing "a limited number of models" to fail to identify their location.
Affected users are presented with a grey screen and a message saying the machine lacks a GPS signal.

Update 3rd April 10:00 CET: We have identified the root cause for some of our products not obtaining a GPS position since the 31st of March. The issue is caused by a ‘leap year’ bug in the software of the GPS receiver. We are working hard on a permanent solution that we will make available on our website as a downloadable software fix. More information will follow later today. If you click Notify me at the bottom of this FAQ, you will automatically receive an update.
Since Saturday 31st March a limited number of models have been having an issue getting a GPS position. We’re looking into the cause and will post an update here as soon as we know more.
If you click Notify me at the bottom of this FAQ, you will automatically receive an update.
A reset of the device temporarily resolves the issue.

A software update fixing the issue is now available via MyTomTom.

I'm going to tomtom next time. My Garmin Nuvi is RUBBISH. Loves to avoid bypasses, preferring you to drive through centre of town - Zurich and Basel (onroute to the airport) are its favorites.

Also, it's idea of 'recalculating' involves...u-turning you to get you back to the original junction it said you should take. It once wanted us to take a 60 miles detour on a 100 mile trip, even after passing *three* signs and junctions for the same destination.

Total crap.

You will get loads of people that will tell you that TomTom are crap.

But for me it always works. Different routes at different times of day depending on traffic (in real time too). Sometimes it does suggest a u-turn but that is simply when that is the best thing to do (it seems to choose a different route most of the time).

I would happily buy another.

I had a Garmin nuvi and as silverburn says it's routes are quite often stupid...

It would often try to do things like take you off a motorway and drive through a town and then bring you back on to the motorway at the next junction... or take you down farm tracks rather than a main road.

You also couldn't edit or save routes, the most you could do was add waypoints, but would have to re do them every time you repeated the journey which is a bit annoying.

As soon as I had an android phone I changed to CoPilot for less than it would have cost to upgrade my Garmin maps.

I agree that garmin sucks but do not be so sure about tomtom:

http://www.bbc.co.uk/news/business-17190763

76% drop is bad...
I switched to Sygic Navigation for Iphone...great app (tomtom maps ) I paid 38 chf for Europe Map and 10 euros/year for traffic info and updates are free. I do not have two devices anymore, I have the navigation with me all the time...

My 3 year old TomTom on my 4 year old Windows Mobile 6.1 phone is

• faster
• more accurate GPS
• better more up to date maps
• more configurable
• easier to use

...than the built in nav in my 2012 modem Skoda !!

I've had 2 Tomtom satnavs now and overall am happy with them except for 2 things:

1) They've removed the compass option - they reckoned it was because there wasn't much interest in it, but I think people who liked it, REALLY liked it...

2) I bought the 2nd satnav here in Switzerland (from Digitec), a Tomtom 1005. It turns out that I can't use the voice control in English because it only offers the 3 main Swiss languages as options. I've read that this is to stop grey market imports but quite frustrating that this was never mentioned anywhere before I bought it...

Do you need a data connection to run that? Would it be the same for iPhone/iPad version?

Just going to buy a navigator and I read the Garmin is not that bad...
http://reviews.cnet.com/best-gps/

So what do u suggest?

if you have a good data plan then I would suggest trying google navigation (not sure if it's available in Switzerland yet) but I tried it in luxembourg once as a built in sat nav didn't know the location but google did .. was very impressed by the directions given.

The other good thing is apart from the data cost it's totally free, it has the latest traffic info not sure about speed camera info.

i have a garmin - its not user friendly or logical.

tomtom is easier and nicer to use.