i have done numerous crossfire and slk brake jobs. this is a 2 on a scale of 10 if you have a few handy items
1. PATIENTCE!!!!! the torx bolts are not visible and can be a pain . take your time
2. motive ind. power bleeder.(50$ from jegs) this handy tool will ensure all the air in the system is gone and allows you to see the fluid moving thru the system
3. 1/2 gal jug and clear line. this allows the fluid to stay off the floor and you will know when the clean fluid is passing thru
4. this is a great time to replace the oem rubber lines with braided lines. cheap to do and looks and works great
let me know if you have any questions during the install