I also received a GPS but it was the Garman c530. I was told I could trade for the bike model if I wanted .It is on sale this week for $429can. reg. $600can.The problem is size of the screen. The bike model is a lot smaller which would be harder to read,so I will try it and see. I guess the only differences between the two would be size and water proof-ness? Are there any others?