The Garmin nüvi 2597LMT is a comprehensive sat nav with free lifetime map updates and free traffic alerts. The excellent voice-activated navigation function is a real bonus too. Although it's still short of a few options, this GPS is a safe bet that earns a well-deserved five-star review.
Best of the rest
Garmin Zümo 350LM
Our friends over at Les Numériques gave this motorbike sat nav four out of five stars. The Garmin Zumo 340LM is a comprehensive and well-designed sat nav that's a top choice for two-wheelers. It has Bluetooth, a bright 4.3" screen, good route guidance functions and lifetime maps. It's just a shame that there are no connected services onboard.
On A Shoestring
TomTom Start 20
With its 4.3" screen and IQ Routes technology, the TomTom Start 20 is a good basic sat nav that won't break the bank. It's easy to use and it has all the basic functions occasional users will need to get from A to B.
Free Mobile App
Waze Social GPS App
This community based mapping, traffic & navigation app offers accurate information for users on the move with the added reassurance of community-sourced road and traffic updates. It doesn't have all the functions you'll find in paid-for navigation apps (e.g. route planning is still quite basic) but it's still a very good route guidance solution. Take a look for yourself—it's free to download.