The concept of this story isn't that bad. They could have done more with it. Action is a bit lacking and it's rather generic at best. It's short (thank god), but still has low rewatchability as there isn't much there to make you want to rewatch it. Animation is typical of it's age. Characters are easy to forget and anime as a whole is worth watching if you seen most of them and are experimenting with OVAs or something. Easy to find cheap on dvd if desired, but there's much better anime to spend your money on.