Thanks for the replies.
I got the older version from West - I guess they are getting rid of the old ones to make room for the new ones.
I didn't sign up for the added package ($49.99/yr US) as I don't think I will use the 'Tack Progress' feature (it looks like it would be a battery pig).
I sent a 'Check-in/OK' message from a different location today. I had the unit on the dash of my car, turned it on, waited about 2 minutes and hit the 'OK' button. About a minute later the text message appeared on my phone. When I got home and checked my e-mail the Google Map showed me to be about 20 feet from where I had sent the signal. I think that's pretty good.
As long as I can get a signal in northern Lake Huron, I think this thing will work out well.
1989 Hunter 30'
Southern Georgian Bay
'Nautai te salutamus!'