Has anybody been using the Pinpointpal Tracker? A number of friends and myself have been using one for the last 2 years and been highly delighted with it. Unfortunately for all us who have them, we now are left high and dry as Pinpointpal has gone into liquidation so our units are now useless.. Not a lot we can do about it now but I need an alternative. The Pinpointpal unit was small and simple to fit and use. Can anyone recommend a similar alternative?