In my opinion Revitar is the best acoustic guitar simulation VSTi (physical modelling).
Sound, Features, pdf Manual, Customer Support, Value For Money, Stability are very good, so I have no critics about that.
User Interface could be a bit more guitar like, the Presets could be some more (the existing are good). The CPU load is a bit high, but that´s because of the really good modelled sound quality.
For that price you can´t do something wrong to buy it.Read Review