Very easy to control rubber without any weaknesses, but also without any real strenghts.
The Fastarc C1 has got a medium sponge that performs well with an allround offensive playing style. Topspins, even on heavy underspin, are easy to play. Passive blocks and counters can be played without effort. It also provides decent spin in all situations. Compared to T05 or Fastarc G1, the rubber is less sensitive to incoming spin.
all in all a very good and quite easy to play rubber for everything. The only bad thing about it is, that it does everything good, but nothing extraordinary.