One more update from sp on his open source and free fork of supminer (ccminer) called Raven x16r/x16s Spmod-git #8 (source) with a bit more extra performance optimizations that should bring faster x16R/X16S with 5 to 7% over the previous release. It is always good to have competition, especially with open source code, though the z-enemy miner 1.16 released a few days ago seems to be a bit faster.
As a recommendation to get the maximum performance with this miner you should try to overclock the memory 500 MHz or more (depending on your GPU) and mine with a fixed difficulty at the pool (normally set the difficulty parameter to around half of the hashrate of the mining rig), so for example for a 100 MHS rig you should set
-p d=50 in the bat file for running the miner. There is also an upcoming fork for Raven (RVN) that should take care of the difficulty readjustment problems it is currently having, so you should keep an eye out for mining RVN to become interesting soon again and not only at times of low difficulty for half a day every few days.