I've had a Seismic Sink for about 6 years and never had a problem with it. Originally I had it under a sprung TT and it was a winner. One note after installing it I never looked back. Then I moved, and in the new installation I found it made only a slight difference compared to putting the LP12 directly on the rack, and that difference was perhaps not an improvement. I've heard it said that sprung tables should be mounted on rigid platforms or they will lose pace and timing. Perhaps the opposite is also true. But I also know there are many VPI owners who swear by Bright Star sand boxes. My advice is to try to determine the type of isolation (air, sand, cones, carbon, multi-element) before getting into which brand, but I think the Sink is a good product and a good value. If you buy one and don't like it for the TT, I'll bet you will find another component that loves it. DVD players, for example, are transformed by pneumatic isolation! I ended up with a Bright Star sand box under the LP12 (major hit) and after moving the Sink around my system found it best under my preamp, as it slowed down and over-mellowed my cdp.
