This series is one of the best, if not the best, anime series I´ve watched. Great action, good comedy, Plenty of Boy vs. Girl moments (a personal fav) great story, and some of the coolest and most nieve characters I´ve ever seen. It also was very unique, having a sense of fresh content great for people new to anime. The first episode already had me roped into it, my curiosity of what was to happen next between the characters, especially Hiro and Zero Two, driving me forward, and it was really hard to stop on episode 12 to go to bed, and it was almost 3 in the morning. I'm pretty picky with the quality of shows, and this was above and beyond
I'd say it's more appealing to guys, just cuz it's more focused on the girls getting put into hilarious and cute/embarrassing positions for the guys, which is really great in one of the episodes where the girls divide the house because of an argument with the boys, and the guys just take charge, causing the girl's plan to backfire, but it is great for everybody into anime.