Nearly everything that made the L20 Ultra great has been improved for the Dreame L40 Ultra — including enhanced suction, improved roller brushes, and an extendable side brush for improved reach.

When the robot encounters an edge it can't get under, it will even extend the mop out to the side, to clean under the surface. Right now, the Dreame L20 Ultra Robot Vacuum is on sale for $800 off ...

The Dreame L40 Ultra is a high-priced robot vacuum ... a value model that had a lot of high-end features for the price. But the L20, a higher-priced model, was a disappointment.

It features an extendable side brush, which moves in sync with ... water pollution and increasing cleaning efficiency. Dreame L20 Ultra Complete (Was £849, now £649) The L20 Ultra Complete ...

This is the product's overall performance score, based on key tests conducted by our industry experts in the CHOICE labs.