I now use my Samsung Galaxy mobile or Tablet as my GPS using
Sygic or Osmand apps.  
Here are some of my older solutions.

1. Cheap 5" Chinese SatNav from GoMallGo on eBay (2012)         
2. TomTom Go 730               
3. Garmin Nuvi 360 Deluxe

I love SatNavs.  I had a Garmin Etrex which I used in the Alps in 2003
followed by a Garmin Quest (2004), then my Garmin Nuvi 360 (2007),
TomTom 730 (2011) and my 5" Chinese SatNav from GoMallGo on
eBay  (I suspect GoMallGo has been renamed  tcromall ).  The pictures
left show the same map location to compare mapping.

My Garmin Quest was OK, it cost £300+, it was waterproof, had a 20
hour battery life, showed altitude, allowed routes with up to 50
waypoints  and recorded track logs.  On the downside the screen was
very small resulting in a poor view of the map.  But the main issue was it
did not give an audible warning of speed cameras and locating
Satellites was tediously slow.

In 2007 I upgraded to a Garmin Nuvi 360 which I used car and bike for 4
years until the mini USB port became damaged through over use.  It
could play MP3's and interrupt them for speed cameras and directions.  
I use the superb  P
ocketgpsworld speed camera downloads.  The
Nuvi360 was good but no track logs, no altitude and it was a constant
struggle to get voice warnings to work using 3rd party add-ons.  Garmin
are unique because you can load Garmin Mapsource software on your
PC which is great for route planning. Unfortunately I found that Garmin
maps always seem to be at least 2 years out of date in the UK,  I
upgraded the maps once which proved to be a waste of money, I drove
85 miles to the office and in two places my Garmin had me crossing
fields where a new by pass had long since been opened.

I bought a replacement TomTom Go730 in 2011 which used TeleAtlas
maps which I prefer (Garmin use NavTech maps), the maps are more
like a road atlas showing built-up areas, water features, railways, parks
etc.  The TomTom could also show bye-ways and off-road tracks which
is great for an adventure rider who owns a Tiger.  The TomTom 730
could play MP3's and interrupt them for speed cameras and directions.  
On the downside I found the TomTom harder to use than the Garmin,
some of the routes offered were poor (no wonder truck drivers get stuck
in tiny lanes)  and every time the software was updated I seemed to
have fewer features e.g. Why did my headphone volume disappear.   
TomTom 700 series are moody and need resetting much more often
than Garmin.  Trafficmaster did not work 99% of the time.  After 12
months the battery life was appalling, not even enough to stop for fuel at
a petrol station.

I find it frustrating that TomTom and Garmin are removing all the great
features I like such as a Jack plug (for headphones), Car units no
longer offer MP3 players on their latest GPS devices.  There are few
customisation options, no track logs, no altitude etc.  This is crazy when
you think that a £23 GPS application for my Android mobile can offer all
these features and more.  

I had been looking for a SatNav with a larger screen and a headphone
socket.  In 2011 I went for the 5"  item on eBay for £70 from GoMallGo
(now £54 from tcromall ), it was a gamble that paid off, at the time
"Brilliant".  The SatNav comes with Nav and Go's iGo9 Primo software
which uses the same TeleAtlas maps as TomTom. Primo is Hungarian
and many users are Czech or Russian which means that some of the
websites are a little challenging.  I was able to download all the maps I
wanted.  Primo software is full of features and it is very customisable.
The larger display is good.  The standard offering has so many
configuration options you really do need to be a bit of a geek to make
the most of it.  When you join the Primo  community sites there are
loads of options.  You can download "Skins" and "Schemes" which
transform the look and feel.  On a bike stick to the standard skin which
is simple and has large icons.  Go for a Scheme with a white
background similar to Garmin.  In the top photo just look how good the
mapping was in comparison to the Nuvi and TomTom,  so much better.  
On the downside the screen is not as bright as a Garmin.  If you are not
a SatNav geek I recommend that you buy a standard mainstream GPS
which have since become larger and cheaper.  I shared the 5" SatNav
between the car and the Tiger.  I loved them.
TIP: Get a MediaDevil Matte protective film from Amazon to reduce
reflections, I buy one for an iPad and cut it to size to make several
smaller films for my GPS, Netbook, phone etc.

Apart from my early Etrex and Quest none of these SatNavs are
waterproof but there are ways round this for the ingenious Adventure
biker.  
Comparing the SatNavs that I have used over the years
Do Check out my Satnav Latest page
I made these GPS Sun Visors myself
from 2mm plastic sheet, bent over a
wooden former with some help from a
blow torch.  All held on with thin strips of
Velcro.
My first GPS a Garmin Etrex
bought in 2002. Just a
compass with an arrow
pointing to the destination.  It
also offered an accurate
Speedo and track logging.
Great fun.
My second GPS a Garmin Quest bought in 2004.  Cost nearly
£400 with color screen and 256Mb of memory which is a lot of
money until you remember  the older Garmin Street Pilot units
had cost £1200 with Black and White screens and 8Mb of
memory.  (I had friends who owned these units who would
spend 2 hours every evening loading maps and creating routes
for the next day. How times have changed).
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