Anyone with experience with iRobot Roomba vacuums

Just as the title states does anyone have experience with these little machines. Thinking about getting one but not sure if the work well enough. I can go buy a super nice dyson for the same price if they don't get the dirt up that well. Anyway, your thoughts and experience would be appreciated. Thanks!!!

 

http://www.youtube.com/watch?v=pXhsUPtsiLU

 

I have one. We mainly have hardwood floor. I didn't feel like sweeping every single day, so I have it scheduled to start at 10 every morning. You would not believe how much junk it picked up the first two months. I had to empty the bin every day. Now that I have had it for a while, I only have to empty the bin twice a week. We have carpet that it runs on too, but wouldn't buy one if that is mainly what you have. It was well worth the money. I feel like it has paid for itself many times over.