That's like asking which tools should I buy for my tool box...



^ that sums it up.

You need to know what you want it for, as there are horses for courses. If you want to get from Home to Tescos, then the TomTom is great, if you want to go further afield, into the unknown, need proper Celestial information better mapping options (such as plotting your own route, us of OS or TOPO maps) then a Garmin unit is the obvious choice.

If you want cheap A to B and you are not to bothered about the route then there are �100 Chinese bike GPS's on Ebay that take memory map uploads.

Or there are the smartphone options,

Do you want easy to use ?

Do you want far away maps?

Do you want to rely only on a frail GPS signal from the sky, or do you want WAAS from land based systems as a backup?

Do you want to follow trails from other GPS's?

Do you want it for the car & Bike, or just the bike ?

Do you want the ability to connect to your phone ?

Do you want it to play music ?

the options are almost endless., you need to know what you want, then you can narrow your choices.

Personally, having used TomTom, Garmin, Lowrance and the Smartphone offerings, I would always go for the Zumo 550 on the bike, TomTom in the car and the Lowrance if I was serious.

TomTom is easy to use, but limited in it's functionality. The Zumo is the best all round offering, tough, reliable, flexible, but has a difficult menu system (until you get used to it) and is expensive, Lowrance is serious kit, if you are asking a question about navigation systems, then Lowrance isn't something you should even look at....... And Smartphones, in my opinion should stick to internet and making phone calls, but should never be relied upon.

If you've never used a GPS, or have limited knowledge then the obvious option is TomTom, but if you want to have trail information from OS, TOPO or Lat/Long sources then the Zumo, but you'll need to practise with it to get to know it.

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Never underestimate the power of stupid people in large groups.