I assume this bottling has not (yet) become very "popular" because of two reasons:
1. The price tag of around 110 EUR was rather heavy for a (nearly) 12yo PC, back in 2013 when it was released.
2. Many people expected or hoped for the sherry influence to be much bigger.
The good thing about that, it's still available after almost three years.
In fact, this bottling is offering typical PC character. The farmy notes and the peat, they're all there. The sherry influence is rather a slight addition to that profile.
If you like PC even without heavy sherry influence, this is a flawless and pure choice. And the price? More of a good offer, nowadays...