Summary: The biggest issue with this unit is that the battery life is, at best, one large room, after 3 months of using it three times per week. It picks up moderate dirt OK, not perfect, but for maintenance usage, ok. Battery is biggest Achilles heal on this product. Having to recharge after every room makes it not so convenient to use.
Summary: In some ways The Rumba works as advertised. What we didn't appreciate is that it frequently get's wedged under two different coffee tables that we have. It also gets bogged down and needs help out of some very plush carpet that we have. Low pile carpet is not a problem. It also frequently goes into the powder room or other rooms and closes the door while tracing the wall that the door is on. As a result it traps itself in the room.
Summary: The filters are fine. However the 6 prong brushes are so stiff that my Roomba cannot transition from hardwood to rug anymore. The brushes get caught underneath the rug every time. This did not happen with the flexible 3-prong brushes that originally came with my Roomba. I am disappointed with my purchase.
Summary: The 6-legged brushes did a better job than the iRobot brush on bare, hard floors but everything else about them was worse. It provided so much resistance against the brush motor while the Roomba was on carpet that it most often wouldn't turn at all. It also constantly would pick up the edges of our rugs and prevent the Roomba from ever cleaning them unless we picked it up and put it on the rugs ourselves, something that has never happened with the stock brush.
Summary: clever gadget, and very interesting to watch, but it would not go over oriental carpets or throw rugs, treated them as obstacles, bumped, grumbled, and turned away. When placed on the throw rug, would whine "please put me in another room." Since we have hardwood floors with plenty of orientals and throw rugs (and indeed, the messiest part of any kitchen are likely the throw rugs in front of the frig, the sink, and the oven), it was largely a waste of time and money.
Summary: Product was delivered quickly and was a good price. The brushes fit onto my 780, which originally had 3 arm brushes instead of 6 arm, like these. I thought it would be better than 3, but all it did was get stuck constantly on throw rugs that it had previously gone right over without a stutter. So i cut every other arm off, and solved the problem. But the yellow filters are the reason for the 2 stars. Clearly, these are not OEM iRobot parts.
Summary: ************************ **** Update on 4 September 2012 **** ************************ Roombie continued to do a fantastic job on cleaning. However, there appeared to be something wrong with his ability to turn on the Virtual Lighthouses. Often, the Virtual Lighthouses would remain powered off, and Roombie would collide into / bypass the Virtual Lighthouses.
Summary: I really (really) wanted my Roomba 780 to work out, and I spent a great deal of time reading before buying and testing it since buying. However, it's going back. First a little about me and my cleaning needs- my husband and I both work full time and like most people cleaning is a necessary evil getting in the way of actual fun. We have no kids, but we do have a golden retriever and 3 cats.