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The aptly named Roomba, a robotic floor cleaner, waltzed into the world and quickly developed a dedicated following. How many floor-care products have their own online discussion group? The Roomba does.
What the Roomba doesn't have is great performance. It's certainly no replacement for a regular vacuum as we found when we tried the Roomba Pro Elite, $250, a recent addition to a line that includes the basic Roomba and Roomba Pro.
In tests using fine sand scattered evenly over an 8x8-foot corral, the Roomba picked up most of the sand, as did a low-priced standard vacuum cleaner. Although the Roomba required no human touch, it did require far more time (25 minutes vs. 3). And on carpets, it didn't deep-clean the way most vacuums would.
When you start the Roomba, it travels in a spiral pattern until it finds an obstacle such as a wall. It follows the wall for a while and then crisscrosses the room ...