+1. Get the puck and don't go for the digital compass. Don't know the D6 setup (pretty sure its this way on the OCS), but I suspect you have to switch screens to get to the compass. I prefer always to see my basic data on my computer. I guess I'd like it better if you could see everything at the same time, but then you are wearing something that looks like your living room TV on your arm. Digital compass IMHO is a cute idea, but I think there really are limits on how much you should cram into one piece of electronics. Buy it for what its good at and get a separate compass. My wife has a puck and I've used it half a dozen times. It's so easy you really don't even need the manual. I also have a Gekko which is on the same level, but between the 2 I'd go for the Mares.