http://jaguarusf.blogspot.com/2008/05/x-plane-9-review.html
Xplane9 maybe good for experienced pilots and designers but FSX is
better for beginning pilots or novices.
Professional pilots may look down on fsim as a training tool, but its
tutorials and ATC prompts are useful for me to get a grip on the
essentials of piloting an aircraft. It only increases my interest in
getting a pilot's license as well as mastering some of the jargons
used by pilots, while having fun. I don't like to be pressured while
learning.
Playing FSX is fun and instructive. I suspect it is much more
difficult flying in FSX because of its limited vision and feedback,
but at least it is the safest and most comfortable way of learing the
essentials especially the terms, operating the instruments, ATC as
well as rules. I also like to memorise the checklists just in case.