All the good things about this pickup have been said, and they are true. I can only add it enhances the character of humbucker Tele's. It brings a delightful flow of high harmonics that are particularly apparent when playing muted strings with heavy distortion.
Don't be afraid to push the distortion to 8 or 10, this pickup has a medium-high output, so you can push it. Also, the plastic frame in pickups is usually shiny and uneven, but these DiMarzio have a nicely flat, and semi-matte, semi-satin finish that speaks more quality.
The poles turn with a nicely firm resistance, and the slotted height screws can be turned with a fingernail or a pick, which is more convenient than a philips screwdriver.
Highest recommendation!