We have the same machine as you Niall and it's somewhere between six and twelve months old. Before this we had a Miele. The Miele needed to be replaced as the drum spider corroded and it wasn't worth repairing.
Both machines have sat on a tiled floor, we think on a concrete sub base with underfloor heating pipes. Both machines have been rock solid, no movement and quiet. Ignoring the time when the Miele was dying, the Bosch is, if anything, much quieter than the Miele (which was at least ten years old when it died). Within reason we can stuff as much or as little as we like in the Bosch - certainly, anything from just my road cycle gear through to quite heavy weighted mixed loads.
In terms of set up, they were just placed on the floor and levelled (we moved here 18 months ago so the Miele has moved too) and have been fine. Neither moved an inch - except when the Miele went south and died!