I got ISTP. Read the description, and it's semi-accurate.
I took a Myer-Briggs test once before and got a very different answer, but can't seem to remember what it was (Maybe INTJ/ENTJ?). I was basically exactly in the middle between two different personality types. On that site, I read the descriptions for those two personalities—they fit perfectly. Then, I read the description for the other fourteen—and they were nothing like me. I haven't had time to read the descriptions for this site, but it feels like they are far more vague and "one-size-fits-all" than the other one.
Just saying. ;]