My friend has been using an Air Tangent for about ten years.There has been no problems,whatsoever.He does not have a table with a vacuum system,yet the sound is absolutely stunning.Clearly a cut above any pivot I've ever heard.I'm intimately familiar with his set-up,and can attest to the fact that,though a linear arm needs some extra attention,there is NOTHING that has the ebb and flow of music,like an arm,of this type.I only wish I had the time to deal with the issues involved in it's care and feeding!
Best regards!