I'm playing Ys IV. I get the feeling that the general reception is that it's good but not AS good as Ys Book I & II, but at least for me in the first hour I'm liking a lot of the changes. Like the ability to move diagonally : D IIRC I think the magic button was replaced with the menu now? I'd be surprised if magic is gone, but I always felt that magic made Ys II a cakewalk compared to I... so I'd be fine if it were gone entirely.