I don't know what the low raters are talking about, cutting this film to shreds with negativities over political factors (Syrians and white turbans, cloths, and scarves etc) along with inaccurate scenery. As I've never visited Greece, and totally not Greek.
However - I AM a big fan of the franchise, and the 1st two films were absolute hits. THIS ONE takes place IN GREECE, after Gustav (late father Gus Portokalos) has passed. And some of the critics fired that no grief was ever expressed in part of mourning throughout, which is B.S. and not really the point factor of the film.
Toula and family set sail to the homeland, to reunite with Gus' old friends and celebrate a Greek family reunion. And we are treated with a most gorgeous island scenery that is beyond breathtaking. Seeing old faces again, since BFGW2. Even if some parts are not quite accurate... it is all still notable. And what JOY in seeing everyone we loved from the original films. Incl. a much beloved mama Maria, who is coping with senior dementia. The love and care the family take in delivering their dad's final wish, with mom in mind. A total MUST SEE