There have been discussions about pmemory on this forum.
As you can expect the consensus about it is negative.
With that I mean that there is not one person on this forum who has positive experiences with it and after some time using the system most if not all of them quit.
So your experience with your friend does not surprise me at all.
Here some discussions about it on this forum.
The titles themselves are telling:
The Memory Optimizer I don’t know. Reviews on Amazon are bad though…