On high spin made a thumping sound on floor; I had to adjust the feet repeatedly to get it the stop but I did put it on a riser. I'd recommend a riser because it is difficult to clean out. I had a similar setup in Italy and had it on a cement slab above the floor. The one I have is commercially designed for washer and dryers in the states. See photo. As you can see on bottom left a machine is the filter and drain compartment. You need to clean and wash out. I perform more frequently as it can get foul if left undone or underdone. GE does have a recommendation for interval. Overall good machine and does not take up too much room.