Ideal for the live and even when taking the studio environment is noisy by ambient noise, a little tricky to install, it takes patience and skill.
Battery (9v.) lasts long (+ year).
As for the sound, you can adjust the balance between the two sensors (piezo under saddle and mic inside of the body), we easily able to find the sound you have in mind.
Installed on my Taylor for 2/3 years, I find the sound of my acoustic guitar when I branch out a sound, not as faithful a decision by micro but it comes close!
Recording studio, I often pair with a stereo jack and micro Anthem and balancing levels, the sound of the guitar is very loyal.