Postives are that the ARPA and AIS totally kick the tail of anything that I have seen before, the charts are good, very readable.  It's nice how you can put a chart in one and all of the other units can get the info from the one memory chip.  It's very easy to setup with it's own built in IP network, and so far it has been nothing short of rock solid.  On my old 2003 RL series Raymarine(then the C120) and autopilot I had nothing but problems, so this is a welcome departure.  Oh and one last thing, is just the array of products that Furuno has that will plug into this Navnet network.

So far the only real negatives are that the redraw speed can be on the slow side, the interface takes a bit getting used to(not bad, just not intuitive), and probably the price.

John

P.S.  I would be remiss if I wasn't told that some of the more recent code releases on the Raymarine have resolved many of the issues with their chartplotters.