Probably very similar ratings for both. I think the arc dragged on way too much for how relevant it is in the grand scheme. I wasn't really a fan of the trials they had to go through before getting to Enel. The ending was okay. The arc as a whole has grown on me a bit as I nearly dropped One Piece during my first read of Skypiea, but I can tolerate it more now.
I don't really have much to say about Enel. He seemed fairly basic to me.