Nath, you need a ride in mine or someone else with engine mounts.
It would be wrong and misleading to say that you won't hear other noises, squeaks etc, than the glorious Grrrrrrr! - It IS a compromise but knowing how much you enjoy an exhaust sound, I think you'll like it and will accept the other squeaks.
As Laurent posted, the benefits in feeling what's going on and the direct taut and tactile feel is well worth it. I guess the main question might be how your family react to the change.
Also I would advise fitting the VWR Lower Mount (Fast Road version to better match the BSH side mounts) instead of the BSH poly insert. It's the side mounts which transfer the soundz but the lower mount which gets the power etc down.