Is anyone out there an owner of the new iRobot Dirt Dog? I already own the Roomba and the Scooba and swear by them as the absolute best investments I have made in recent years. I just saw an add for the Dirt Dog and am wondering if anyone has one and what they think. If they're even remotely as effective as the roomba/scooba team I'm in buying one. The pricing on this model is unbelievably reasonable.