Many people claim that because they're tall they struggle to use them but I'm 6'3" and find using them better than a normal length blade.
People who claim they can't use them because they are tall, or say things like "the handle sticks out to much" are using them incorrectly!!You hold the handle in the same place you would a normal bat. It really is that simple, but the amount of people I see pick up an mmi3 and hold it halfway down the handle and say "how do you reach Yorkers" baffles me. it's a short handled bat! Not a kids size 4 bat, stop over thinking and just hold it in the same place.