I bought into the Eufy ecosystem on the same premise, but it's still internet connected, so all you really get is a pinky swear that they're not copying your data for their own purposes. Just because it's on-device doesn't mean it's not also elsewhere.

Anoth quote from the website:

> The HEPA bag is designed to hold about a week’s worth of debris with daily vacuuming and mopping. Replacement frequency will vary based on your usage.

The "membership" (ie. prepaid refills) is advertised at $180. The best-case scenario is you're trading the always-online smart appliance debacle for the overpriced ink cartridge debacle. Pick your poison.