My take would be that you'd be initially left impressed with them (a change can be refreshing in many ways..), but which soon wears off after a long while and be missing back those energy behind snaps and plucks of string, as well real heft/power behind bass drives you used to be getting from your dynamic speakers (with maggies you get big full bass but generally lesser impact). And although the soundstage and imaging larger--lifelike in size, scale and presentation, in comparison, they are also slightly vague and diffused--not as pin-point or defined.
Therefore, as it is quite a dramatic change in musical presentation from what you are accustomed to, it is advisable to spend longer hours with them at dealer or friend's first (with your favorite records) to get a better grasp of their sound, and make sure they are right 'for you and your music' prior to taking the plunge.