Evolution Robotics Mint Automatic Hard Floor Cleaner, 4200

I must say, I'm impressed with the mapping system on this little guy. I have a very large (20'X20') open living room/kitchen area giving plenty of obstacles to confuse it. There's a staircase (which it deftly avoids), an island, a kitchen table with chairs, a couch and a number of tables for it to go under, an area rug and a piece of curved beveled glass on the floor that serves as a stand for a fireplace (which it surprisingly does not ride up on). Also, the room is overall "U" shaped with several entryways. This is the only robotic cleaner that has been able to figure this room out in its entirety. Other things to note is the room has a large fan and high, sloped ceilings and it can still find it's way.

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