I walked in thinking I was going to get some otaku fetish for 100 chapters. Wrong. This series turns into a whole different monster by the 8th or so volume. I would say it even deconstructs the manga itself. It became way more adult and mature for my taste. But, I can tolerate mature stuff when I am reading. It made this series very engaging.

Gunslinger girls volume one looks nothing like Gunslinger girls volume 15. It's actually brilliant and well thought out writing that overarching led the whole series. I would say, if you get bored of it, keep reading. That piece of information comes around in the later chaper.

Overall, I highly recommend this series as one of your earlier manga series. It's a mix between mature and childish, action and political critique. You learn the different philosophies of the handlers and backstory of several girls that they didn't receive in an anime. The lesson doesn't celebrate gunslinger girls,. Rather, it says it was not a good thing to do, though the ends justify the means.