Don't know if you mean the individual platforms or the large unit Townshend subsequently marketed. I don't know anything about the latter. If you mean the old Seismic Sink platforms for individual components, however, I had no end of trouble with them. Something usually went wrong so they wouldn't reinflate, it became almost impossible to level them, etc. I wound up throwing out 3 or 4 and giving the rest away because I wouldn't dream of taking anyone's money for them. Don't know the Clearaudios, but I'm very pleased with the Signal Guard II platforms I replaced the Townshends with.
