We had some friends over for dinner last night and I served this salad along with the Pork and Prune Ragout (also on this site). I couldn't find escarole so I substituted Swiss Chard, I cut way back on the onions because not everyone likes a lot of onions, and I forgot the olives. These variations notwithstanding, the salad turned out really well and I received several compliments.
One tip: if you haven't peeled grapefruit this way before, you might want to allow a little extra time. This was my first time but with a bit of practice and a sharp knife I managed quite well.