i used the toytec lift buts the same principle. the front strut doesnt really like to be put back in place with 3in of spacer maxing it out. make sure you got a second set of hands, pry bars , rent spring compressors from your local auto parts store, and basic metric tool set.
Make sure to have an extra 70 bucks to get your alignment done afterward, mine had something like 8 degrees of positive camber.
have fun.