The first hand experiences can actually be very biased and different for two different individuals. I refer to you two links so that you can read about the reviews of Jet King.
http://www.mouthshut.com › Employer › Education Companies › Professional Courses
However, this will make you more confused. What I suggest at the end is that if this is your only option, go for it. If not, explore other places too and after thorough comparison, make a choice. 🙂