I've only seen the first one, and was really disappointed. The first hour was very good, a great celluloid interpretation of W Gibson-type stuff, but then it got all macho and gung-ho.
Maybe I was put off by several friends saying "You'll really love this! It's right up your street" and then finding out that the film was typical Hollywood (big explosions, dramatic soundtrack, rubbish dialogue, 4th rate acting, and leaving me with the feeling that the thing was half-finished and rushed to meet deadlines and an order to "get some more action in there" from the bosses).