I read these when they first came out. At the time, the computer stuff really worked for me. I also loved Joanna, because she was so different from characters I'd read before. But....they haven't worn nearly as well. I also found that Hambly had certain story tropes that didn't work as well when I read them in further books. I like Joanna less now than I did before, which is a bit odd. I've always liked the third book the best, it's the only one I still comfort read from time to time. My favorite parts are the comrade bits when they all travel together.