10/19/2014 well, i just bought another one, from a hardware store in Texas.
this makes 6 total, to clean my entire household all in one Saturday. it is important to bot- proof your house, in order to have success with the units. pick up chairs, clutter, area rugs, wires, anything that will make the bot get stuck or waste battery.
make sure you watch the instruction videos, available on this site or on you-tube. a lot of people have ridiculous expectations of what a robotic vacuum should do. it's a tool. learn the tool's limitations and learn to work with them.
i also own a neato xv-11 and two mint 4200s for damp mopping.
here is my blog http://www.frugalvillage.com/forums/blogs/ladykemma2/5432-my-review-dirtdevil-dirt-devil-whiskers-robotic-sweeper.html