Im down 20 lbs in about 3 months doing crossfit. Lost 10 of that the last 4 weeks after switching to Paleo for a little in-gym challenge we are doing.
+100
Crossfit will make you do things you currently hate to do when working out.
If you are serious about changing, go find a box, do a week trial for free and see if the environment is for you.
If you are honest with yourself and stick with it, you will see the same results as these guys have posted here.
"You have to get comfortable with being uncomfortable"