You do need a 'special' tuner, but most modern tuners offer an option for 'sweetened' or Buzz Feiten tuning. The guitar definately sounds better, especially if you play alongside keys as I do. However, you cant get a guitar that has it and tune it to 440 as it will sound out of tune slightly and defeats the objects. All my Vanquish Guitars have it and I would recommend it to anyone. Its not a black art or something special, its just different intonation and a new nut basically.