This is not a pickup, it's a microphone with special analog processing!
The installation is easy and almost noninvasive. You just have to enlarge endpin hole on guitar body. There is 1'' wooden joint block, so don't worry it will not change guitar characteristics.
The sound is faithful and keeps the natural characteristics of your guitar.
It cuts the low end frequencies!!! This is good when you want to mix it with band, but not everyone wants this.
If you are solo guitar player or a folk musician, get Anhem. It uses the same mic without special processing and lowcuts.