Been there, done that -> http://forum.beemaster.com/index.php/topic,11577.msg77458.html#msg77458
As you try to calmly inspect and manipulate, you will end up standing in exponentially growing tornado of bees that are returning from foraging frantically looking for their entrance that is now gone.
Standing in the tornado is just part of it, and didn't really bother me, but it could for less experienced beeks. My biggest issue was trying to replace supers removed for inspections. With bees in the hive boiling out the top trying to leave the hive, and bees crawling up the front and over the lip looking for the entrance, it is impossible to put a super back on without crushing a bunch of bees. Even using the slide or twist into place method doesn't really work as the bees continue to head for the opening as it is reduced. Even as a seasoned beekeeper for over 30 years, I find myself rushing, killing more bees and making them angrier.
There were no benefits to me that outweighed these inspection difficulties.