The first thing I noticed about this Wah-wah when plugging it in was that it was noisy. After investigating, I found that the noise was coming from two sources: a scratchy potentiometer and the removable base plate which was not electronically connected to any ground point, as the paint was insulating it from the rest of the chassis. I sprayed the potentiometer with electrical contact cleaner, but it didn´t seem to help, so I contacted Thomann, who were very helpful and said that they would replace the pot free of charge. Once the wah got back to me, the second pot was much quieter. I solved the base plate issue by covering the inside of it with copper tape, and connected a wire from the tape to the ground lug of the input jack. After this, the wah was much quieter.
Once these noise issues were solved, the wah sounds good and feels good. It is obviously well built. My favourite sound is the ´wacked´setting, which gives you a deeper bass when you rock the treadle back. The LED is very handy, the input level adds a nice bit of grit, and the Buffer does its job well to make the wah usable in front of fuzz pedals.
Overall, it´s a good wah, my only criticism being that it comes with the base plate unconnected to ground, which could be frustrating if you have little experience in tracking down noise problems in your rig.