I bought this originally to open up my controllers in order to give them a thorough cleaning. however I remembered my ds lite case had a broken hinge so I decided to make it my first project.
overall the process was fairly simple (though aligning everything up again after proved difficult at first) using the included magnetic mat made sure I did't loose my screws (this was a big issue when I opened up a ps2 earlier this year to clean it)
Make sure you use the proper sized bit. I'm not sure why but my tri-wing bit actually shredded itself making gripping later when I actually needed it harder.