Roborock S4 Max Review: The No-Frills Robot VacuumStaff·November 15, 2020News & ReviewsReviewsSmarthome Reviews Here at AndroidHeadlines, we test out a lot of robot vacuums, and we always prefer Roborock’s to the competition. Roborock likes to emphasize the Source: Roborock S4 Max Review: The No-Frills Robot Vacuum