Congratulations! That's the same unit that I have, and I love it. My tip to you is the same for anyone buying any GPS unit. Read the owners manual, put batteries in it, turn it on, and walk around the block. Walk some more. Mark waypoints and navigate back to them. Read the owners manual again. Let someone else drive, and use it in a car. Put more batteries in it, and do it all again. Get familiar with each of the pages, or screens, and figure out what information is available to you on each one. You'll have to decide which ones to view, and when. You may not care which satellites are in the constellation, or you may want to be able to tell where a satellite is in relation to you, and your view of the sky. You may not want to do anything more than mark waypoints and navigate to them.
Fishrmn