One of the funniest manga I have read. Story could be slightly better, although it is still on a very high level. Art is very clear and indeed "great". You don't stop at one point thinking "what was that? what jus happened? did I miss something...?". Every fight, every move is shown. Characters in Mx0 are going to be remebered by you for a long time. Mostly the main character Kuzumi Taiga, but also others are developed physically and mentally. And the enjoyment of the series is undoubtful. Every time there's something going on and so you have no occasion to be bored.
To sum up, Mx0 is a clash of romance, magic, school life and good old fashioned hand to hand combat, all in good quantity, which is almost the best mix-up. The biggest minus of the series is that it was cancelled and met its ultimate end on 99th chapter.