Bought Sword Of Islam DLC for the CKII a while ago, and I have finally started to play as a Muslim ruler. Started out as Emir of Seville, now playing as the Sultan of Andalusian Sultanate. Progress so far in Iberia looks like this:
Full sized pic.My Sultanate is very prosperous, and only the provinces/cities of Venice, Pisa, Baghdad, Tunis and Constantinople can rival Seville and Granada in wealth. My armies are the 4th largest in the world, only Holy Roman Empire (Surprise,eh? OP'd bastards...
), Persian Empire and Egyptian Sultanate are ahead of me in that regard, although I'm fairly certain that with never ending Christian Crusades to Jerusalem, combined with my never ending territorial and economical growth, I'm certain I will climb past Egypt very soon.
Christian Kingdoms housed in Iberia have been pretty much beaten into a ruin and submission, although the entry of the HRE to the scene with its conquests of Barcelona and Valencia will make things uncomfortable in the future.
And finally, overlook of the situation in the world:
Full sized pic.