I simply don't understand why people rate this movie so low or hate it, other than being purists hung up on the traditional Hercules legends. First, the plot was decent with no major holes. Yes, it differed significantly from Hercules mythology (most notably Hera) but if you take it on its own merit, it was good, consistent, and realistic; surprisingly, despite tending to be a purist myself, I kind of liked the divergence, as it put a slightly different spin on the story and movies sticking strictly to the mythology have been done to death. I also like how they kept him literally a son of Zeus and gave him supernatural powers (which would only make sense as a demi-god), when many Hercules movies keep him strictly mortal and maybe being stronger than normal. Second, the acting overall was good, with Lutz a pleasant surprise. Most big guys are cast based on body and have ZERO acting ability. However, Lutz is definitely different than the norm, and shows a full range- not the typical stoic/plastic look most big guys show. His shock, rage, then grief and worry over Hebe's wounding was particularly well done. He also consistently shows the optimism and hope his character is trying to encourage. Definitely gets to shine here vs his meathead role in Twilight. Third, the sets and costumes were great.
Overall, this movie far exceeded my expectations given Its rating. Recommend watching, if you can cast your preconceptions aside.