They're also relatively big and ideally the thing they're standing on is attached to the wall or has a 40kg damper (i.e. a concrete pavement block or something similar).
I had one in my office for years and no one could hear it on the other side of video calls.
Re size, the bambu A1 with the AMS lite takes up quite a bit of space - but the option of not having to switch filaments and not having to worry about filament running out mid print is sooo nice.