Just like Ocarina of Time 3D, Majora's Mask 3D is an excellent remake of the N64 original.  While some things have changed, the core gameplay experience hasn't and it remains just as fun today as it did when I first played it over a decade ago.  The three-day cycle is definitely a change of pace from past Legend of Zelda games and works very well.  If you're a fan of the series, this is one you definitely don't want to overlook.