How is reliability across these products based on the data available?

Most curtain robots here sit in the 4.1 to 4.4 verified-purchase range, which is solid but not exceptional. The lower-rated outliers (such as the Aqara E1 track version at 3.6) suggest setup friction and travel-distance limits are real pain points. Because we found no independent lab testing for these exact listings, treat the ratings as directional rather than definitive.