Surpringly excellent nut. Was very skeptical of the manufacturer's claims because they sounded rather extreme but were actually very accurate. It does increase harmonic content. And has improved tuning stability. The material is extremely easy to work with. Was pretty easy to file down the bottom to get the slots at the right height. Being able to finely adjust this height greatly increased playability. I do highly recommend that the guitar be well set up with this nut though because the nuances are amplified and this includes string noise from setup flaws. But after those were addressed this increase is quite beneficial. The tonal improvement was very unexpected. Almost like playing a different instrument. Very much so improved the playability to the point that I have been playing my Telecaster a lot more often now. An excellent value considering the low cost and the outsized improvements you get with this nut.