I have an Oceanic 250 but ended up buying a Reefnet Sensus Ultra for data collection. It was annoying having to spend the extra $175 for the unit+docking station+serial/USB adaptor, but still cheaper than paying for the Oceanic cable in addtion to VirtualPC for my Mac. Suffice it to say I'm more inclined to support Reefnet in the future than Oceanic.