The Z-Sense bracket STL can be found here:
http://www.z-temp.co/support/part-files.htmlMake sure the screws that hold the bracket to the printer frame are good and tight. I find that once I get it dialed in I don't have to touch the adjustment for weeks or months on end.
I spray the glass with Aquanet extra-hold hair spray. Apparently not all hairsprays are created equal, it has to have some kind of acrylic ingredient to work well; there are lists of products that work around the web. I find that I can easily do 4 - 6 prints without re-spraying, and I usually spray right over the old spray without bothering to wash it off (not that it's difficult to wash off if you want to).
I print PLA at 200 - 205º, Z-ABS profile, with the bed heat switch on position 2 (the next-to-highest), speed at 80 - 100%, and 150% initial layer extrusion. The initial height does need to be pretty close to the glass - much closer than you'd use when printing with a raft on perfboard.
It's pretty much "hit-print-and-walk-away" once things are adjusted and set up right. A lot of Z-Temp production parts are done with this method.