We have a Dyson upright but I hate it - it's huge and heavy, doesn't have a retractable cord (that drives me nuts) and it looks like the robot out of lost in space (we actually call it B9 which was the robot's name!).
The Bear recently bought a Roomba........ OMG the best gadget EVER. Yes, you do have to clean it after each cycle BUT it does the vacuuming for you. You turn it on and it tootles around the house vacuuming, you can go out and come home to clean floors. Love, love, love it! Great entertainment for the kids too LOL