I have one that I've had for a couple months. There are slits in the drawers and there are three slim foam filled humidifiers, one for each drawer. I calibrated the hydrometer and put my digital hydrometer in it for verification, filled the humidifiers with 50/50 and set an extra container in the bottom drawer. It took about three days before it reached 70%. I took the extra container out and filled it with cigars. It's been 68% since.
One of the things I really like is the three drawers. At first I thought they may make it more difficult to maintain constant humidity, but so far that hasn't been the case. What they do is alow easy access to a variety of cigars wihout having to dig and search. I think in the long run it's open less and your cigars are handled less.
RD