Can only confirm that the Garmin III Pilot Never ceases to amaze me every time I switch it on.
Previously had a chunky Garmin 95XL, bought years ago and whilst good in its day was slow to update and disliked batteries a lot.
(Anybody wants to buy it, email me)
The IIIPilot I checked as a rough guide to accuracy one day (zoomed in mucho)put me approx 15feet off the runway centreline whilst I was actually on it. Thats what I call pretty funky. Splash out in other words for my trusty friend which has seen me all through Europe with added confidence and ease. Lifes too short not to!