I was there for job searching in pune.. and I have not attended any of the classes for aptitude test..so I will not be biased to anybody..
But what Nagendra has told in his answer is right.
When I attended many campus or interviews , I saw there are nearly 65–70% of candidate who cracked the aptitude test are from PANKAJ GANDHI’s classes.
And many of my friends are doing apti classes there and to my juniors also I suggest going to him and be the best in aptitude test.
I heard from many of my friends that He can make the best come out of you even if you are nothing. there will be throughout the day classes and also test were there.
He will make you not only calculate rightly but also will help you increase your speed and make you comfortable with the watch..(Solving withing the specific time).