So the movie was gimicky, retro, and didn't sport the best writing... So it didn't have convincing characterization, or any meaningful continuity of plot with the previous three installments in the franchise. All this is forgivable. I mean, come on... Sean Connery in the last film was a classic sign of death-throes, but pulled it off with style of a sort.
However, when it comes to aliens... Give me a break. Roswell? "Living Dead" temple guardians who were apparently built into the architecture? Cate Blanchett as a Russian with varicolored eyes, lines seemingly written by a third-grader, and bad lighting? These things are unforgivable. Oh, yeah, and Harrison Ford's neck wattle. That was TERRIBLY attractive.
I wouldn't recommend this to a friend if compelled. I can only hope, in the fullness of time, to forget that this appalling spectacle exists.