The RCC should be nice and quiet when it opens. That is the most appealing part about the place. That is, until the buffet cart arrives with the prime rib carving station. However, that comes out 3 minutes after your JJ flight departs. (And, note that if your JJ flight is delayed, they also delay the buffet cart, so you'll never get to experience it.)
The wine selection is similar to all the other EZE lounges I've been in, which is to say, better than the Palermo Plonk you are always teased with, but not as good as your usual teeth-rotting swill. Just remember, it would be £20 a bottle in your native land so you can pretend it is fancy wine. The prime rib really brings out the flavor, but you will never know.
Another FTer is captivated by the caramels by the front desk, and has been known to make special trips to/from EZE just for the caramels.
I just usually go over to the RCC when the AC gets too busy. I also sometimes go to the Salon VIP Vomitus next to the AX lounge for another change of scenery.