Quite enjoyed it, amazed at the breadth of Eco's learning (or did he just make that all up...?). And how brilliantly he puts us into the mind of his characters, arguing - and convincingly (the research, I suppose), that the sun must go about the earth and that to go across the dateline is to go back into time ... I would suggest it's a brilliant recreation of the 17th Century Mind...
a miscellany of completely unrelated thoughts...