I recently started to listen to EMG's Enchantments file, and i can say it seems to work for me. What better to explain than telling about my experience.
Since im interested both in transformations and general improvement, i chosed to enchant apples for permanent improvements on the long run. I decided to give apples the following effects on me:
1- When stared for more than 3 seconds, apples create an urge to study and work in my projects for a while.
2- Over a moderate amount of time(2-4 hours), eating an apple would cause me to burn a small amount of fat (initially 1/2 pounds)
3- As a signal that things are working, eating an apple would increase the size of my penis during the duration of effect 2 (initially doubled length/girth)
I have eaten 3 apples since first listening to the file, and i can tell effect 1 does work. Effect 3 worked a little, yesterday i felt floppier than usual after eating 1 of those apples and after an erection, my penis looked 1 inch longer than usual.
Conclusion? I think that with extensive use of the file I would reach the fullest potential of the enchantment, as well as increasing my efectiveness with other files as well.