I have the G2 for my area. It came (upon request) with the boat during a Garmin special promotion. I have to second what's been stated earlier: Heed the warnings about its auto-routing feature. It's great, but.......I asked it to route me across a lake to a location I knew would be tricky to get to (around a peninsula, miss an shallow area, cross a causeway under a short bridge section and enter the opening of a river). It routed quite well, except for entering the river where it crossed over a section less than the 3' minimum set depth. The funny part was that it popped up a warning screen telling me I chose a route that violated my minimum settings. LOLOL I found that to be hilarious because IT chose that route, and then blamed ME. So although very useful, thoroughly check the proposed route, keep a sharp eye out while underway, and remember it can never 'see' other boat traffic anyway, or new obstacles, etc. Don't get me wrong - I really like it - Just don't get complacent.
Todd