We checked each bot’s noise level, whether it moved easily under and around furniture, and whether its brushes could tackle corners. Under the right circumstances, the i4 is a great, relatively inexpensive cleaner. But the first i4 EVO unit we tried in this testing cycle fell short in its app https://automaticvacuumcleaners10975.jts-blog.com/33637621/the-ultimate-guide-to-automatic-vacuum-cleaners