For comparison, we have now the cooler KB 2922 ordered by Severin - this is indeed a lot more expensive, but much quieter (the highest level is comparable to the sound of the Eco-operation with Mobicool, in Eco mode, the Severin box is barely to hear and there in her no idle noise).
Another (small) drawback of Mobicool box:
Will you ambidextrous handle it, the lid using the other hand folded handle must be kept open - but the lid is then not 90 degrees but only about 60 degrees open and thus it is difficult to see greater things. This is also better resolved at Severin, here is the vertically folded-up cover on its own above and thus has both hands full access to the entire contents.