The Max Pro 2 is the first-generation camera drum with a 43% larger entrance, and what owners report is mostly continuity with that model: cats can adapt quickly, and the drum scoops stool and urine clumps well. One owner's elderly high-peeing cat used it repeatedly without leaks.
The friction is around the edges of the machine rather than the mechanism. The drawstring bags are the most discussed topic, because PETKIT recommends its own and warns that some others will not fit. Two owners report a waste bin that seemed to hold odour, one found the room unbearable within two days, one had a standing urinator spraying into the camera opening, and four had app clips that would not play. Two other owners call it a low-smell box, one of them next to two Litter-Robot 4s.
Multi-cat homes that want camera identification and do not mind buying PETKIT's bags are its natural owners. One shopper weighing it against the Purobot Max 3 liked the pH-litter monitoring here but wanted the irregular-usage alert advertised for the Max 3.