There was a previous thread on this too.
Saw them in my local store, the store had locked the bottom box, so I couldn't open it, but the top was open. Some of the locking buttons were already broken off so that's not a good sign, but it's probably because someone ripping it open not knowing there was a lock on it.
Versus the HF 44 that I own, the drawer slides are smoother (or should we say "faster"), but the smoothness also makes it feel cheap if that makes sense. It makes the drawers feel lighter when they rocket in and out, so I couldn't get a good feel of the "heftiness" of each drawer. I couldn't check for dual slides on the bigger drawers because it was locked.