Hi,
I also got the email where they advertise this thing ("... the holy grail of improving performance" and such) and frankly thought that it was a steaming pile of... Anyway, the hyperbole should be interpreted as a warning label. Usually if software is advertised like this is one can be sure that it's nonsense. There have been way too many "performance tools" that promised a magical performance increase and most turned out to be BS.
After reading some of the description it seems that this software stores frequently used files on a fast drive (i.e. SSD) in order to make access to those files faster than if they were stored on a conventional harddrive. Perhaps this makes sense for certain applications, but I really don't see how this would improve performance in FSX/P3D in any significant way. A big chunk of data is loaded when the flight is started, and then the sim grabs all additional data as you fly along. Even if this loading of data (which is continuous) would hamper performance in any way, which is unlikely, caching any data would make no sense at all unless you always fly between the same two airports along exactly the same route.
I may be wrong, as I don't have much technical knowledge in this area, but my gut tells me that this is all BS.
I like PCAviator and have frequently bought from their store, but if they feel the need to advertise something like this I'll stay clear of them in the future.
Cheers,
Steve