Read the reviews available in the forum. It all depends on your choice of preparation. Few people are comfortable with a gentle nudge while few require tutoring.
Both of which are available online.
Most of the major players have online training most notable of all being the MGMAT.
Check the reviews and see what people say here and then come to a conclusion.
To add to all there is an added advantage you can stop and start at any given time as far as the Online content is concerned and there is no time restriction.
This time its personal..