Ah, my friend, I have been in the T1 Civil Aviation First Class lounge many times. It's really very nice and I would recommend it wholeheartedly. It's free if you are a Diners Club card holder (as my wife and I both are), but I don't know what the cost is if you're not.

It certainly is much nicer and quieter than the two Marhaba lounges, and also has very nice shower facilities. And it's also hugely nicer than that disgusting Emirates Business Lounge in T3 (the worst lounge I have ever been in). Pity that EK has stupidly used this lounge as an excuse to bar my wife. They don't seem to worry about the lost revenue. Perhaps they should...