After some help from Moda(greatly appreciated) I was able to get Sygic to work(once) on my 610.
He is correct in saying there is minimal to no lag with it.
Seems my GPS SD Slot is faulty and only recognizes cards when it want's.
I have had this problem happen when updating in the past.
One other problem I just noticed while playing around with it.
When you select BT with the headlights switched off there is a buzzing noise coming from the speakers and the screen goes dim every couple of seconds (flashing)
but as soon as you turn the headlights on both stopped..
I always have my light on auto so I have never noticed this until today.
Andy