Does Kyokushin Karate teach useful self defence skills?

Your kidding,right?Just look at some video clips of Sensei Mas Oyama,the founder of Kyokushin Karate,and all questions and/or doubts concerning it's effectiveness will disappear.But of course,as in all things,you will only get out of it what you are willing to put into it.If you are dedicated to hard training and continual practice it will work for you,if you are not,it wont...like they say,practice makes perfect only if you practice perfectly.