Limited movability is a common issue for even the best robot vacuum cleaners, so it's great to see Hoover focus on this in particular. It also has a low noise level; only 65 dBA in Quiet mode ...

T3's Hoover HG4 Hydro Pro robot vacuum review in a sentence ... Official noise stats come in at 65 dBA in Quiet mode, or 74 dBA in Max mode, which is more than acceptable, I think.