The Triplanar has the most durable bearings used in the industry, being the hardest metal bearings made anywhere at any price. It is also one of the most adjustable arms made and features a damped arm tube so it won't talk back to the cartridge. Three version are available- the original 9" version, a 9" version using carbon fiber composite arm tube, and a 12" version (also carbon fiber).
I have several LPs that I recorded and so have the master tapes. So far the Triplanar has made the best presentation of those LPs, besting arms that cost twice or three times as much. Image stability and the ability to get the bass right are things that really seem to set it apart.
One thing the Triplanar as taught me since it is so adjustable is that the ability to track the cartridge correctly is far more important than what cartridge you have!! It is a true gem in modern arms.