As far as caching goes I love the Oregon, but I set a route this morning to a cache about 5 miles away using the road map for uk from Garmin. It pushed me onto the wrong side of the road most of the time and tried to get me to go around roundabouts the wrong way. It then tried to get me to go up a one way street the wrong way. This has been a one way street for at least 12 years.
I may have been spoiled for navigation coming from my tomtom but to pay for mapping that is at least 12years old is a bit much.