I'm not sure what your expert is saying.
Many new bows are coming w/ STS as standard dress.
I for one, just put a MeanV2 on my Black Ice and I am giong to add one to my Trykon.

The MeanV ADDED 5 solid fps, made it dead quiet and I can't tell I fired a shot.Itdidn't change anything as far as being in tune is concerned.
I can't speak for STS systems , but I'll put a MeanV on every bow I buy.