I've had this strobe tuner since my days on the road with Santana and Dylan. I used it to tune and adjust intonation on their guitars and tune the bands' keyboard instruments. For a long time, this model was the go to tuner for most guitar and piano techs, and it works just as well now as it did then.
Check out the pictures. This unit has been living in my shop and has never been exposed to cigarette smoke, cat hair, or dragon fire. Some big egos, but none of those other things.