iRobot Roomba i4 vs iRobot Roomba J7+
- Great for large rooms
- Quiet operation
- Comes with a 45 day auto emptying bag
- Takes an hour to clean 400 square feet
- Gets tangled in hair and requires manual service
- Great for carpets
- Doesn't do well on tile or hardwood floors
- Requires mapping run after initial setup
- Good value for the price
- Five year experience with the IRobot 900
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