I share the same opinion as Rossi. In my view:

- its way way way too expensive
- its not big enough difference in performance
- the Powerkit HP figure should have been offered from stock but Porsche wants to milk the cow for all its got in terms of engine outputs, so it makes me more reluctant to give them the extra money they want for it, which on top of it its a ripoff for its clients.

However, it all boils down to personal opinion, so others may still see it worthwhile.