I was surprised by this anime. The first episode was good, but then from then on I was a bit unsure if this was just going to be another Mecha show with nothing unique in it... Well I ended up stopping at about episode 13 or so, but then as soon as i watched a couple more I watched all the way to ep 24 in one night. The rest was very good and took a lot of twists that I didn't expect. I felt that it was somewhat unique, which can be hard to come across.
P.S. The opening and ending for the series in the later half is awesome! :):)
Overall I enjoyed it and was one of the only animes i've liked sense I watched attack on titan. 8.7/10!!!!