I finished reading Thor 4 not that long ago and enjoyed it. The story where he goes into the underworld to fight for Hercules' freedom was definitely the high point. There was also a bonus "Mighty Sore" story from Not Brand Echh #3, which at first I thought would be terrible but actually turned out to be mildly amusing. I think having Kirby draw it (with Giacoia inks) and Lee write it was what saved it for me, but I don't think I could handle an entire Masterwork of this kind of silliness.