iRobot Roomba Discovery SE Robotic Cleaner

I spent about 6 months reading pros and cons re: iRobot's Roomba. When my husband suggested that we purchase one, I jumped on it. That was 2 years ago. I bought the first one from a company that offers a lifetime return guarantee, and considering the complexity of the machine/computer/robot, I decided that bargain basement shopping was not the way to go. Received the Roomba Discovery and love it. A year later I purchased the next generation, the Scheduler, for my daughter and hated it--pieces fell off with each cleaning (a little yellow doo-hickey on the brushes) and her pets' hair clogged it, as did her very long hair. Exchanged it for a Scooba. Great choice for her. My husband and I purchased a second home, got a second Roomba Discovery SE. The Discovery model was no longer available from my 'source' so I bought it from eBay at a discount (though still pricey). The caveat: iRobot will not cover any guarantee because it was purchased from eBay, what they term a 'third party seller'. Anyway, love the Roomba Discovery. 'I' vacuum every day or two, then once every so often hit the corners and baseboards because Roomba misses them. I have hardwood floors with oriental carpets. Roomba doesn't like fringe; I learned from an old carpet guy to use trusty duct tape and tape the fringe to the back of the carpet! It worked like magic--the fringe is safely tucked and taped on the underside of the rug and Roomba works her magic with no hesitation. An added bonus is that the v-space between the hardwood boards is safely vacuumed and GENTLY brushed (an ordinary vacuum with a brush will beat the hardwoods unmercifully).