The first thing you need to know, a lot of filler episodes. I could see a lot of people dropping the anime after about 10 episodes, but the story offers something very new and refreshing which is odd given the year it was made. I honestly saw myself dropping the series maybe midway through, but you have to stay into it! The art is okay, the anime was made at the turn of the millenium give it a break. People that are very particullar about artwork might want to stay away from this anime. Moving on to the sound, the opening/closing themes are both repetitive and aren't anything to write home about. I couldn't tell you the difference between sounds of arms and regular guns, and the voice acting is pretty close to horrible. Still yet, I can't give it lower than a 6 because of the sound effects. The sound effects made my day! The characters aren't anything special. They serve their purposes and don't really develop until later on in the story. But as the story and fillers progress, you start to find affection, humor, and curiosity for all of the characters.
Basically, here is what it comes down to.
-You HAVE to wait for the story to develop, slow down and enjoy it.
-This is an anime for people willing to look past the art, and more into the meaning and depth of the story.
-Skip the ending song.
In conclusion, I find the anime to be amazing in terms of story, but the amount of fillers really made the score suffer for me. You should be able to find it for cheap anywhere, and I truly recommend picking it up if you can. Give it a chance! Thanks for reading!