The first installment had all the great elements of Sci-fi and comedy. It also did it in a way that you wanted to see it over and over. I have seen the first one about 10 times, but doubt if I see this again more than once. It has all the special effects that everyone is use to, but I found it boring to a point that I did drowse. There were only one or two funny lines compared to the first one, which I loved. Good actors, of course, but the material this time wasn't great.