Unlike another report, mine arrived well enough packed and undamaged. A couple of foam packing corners were out of place, but because there were also cardboard corners, it did not make a difference. See pics.To me, it seems the door has a *two* point lock (top and bottom, but not side), but I am no expert. Anyway, it is good enough for me.According to web sources, you need to keep the vents closed unless you hook up tubes to vent the thing to the *outside*, which is of course nontrivial. So I just screwed in the caps all the way to close the vents.I found the thing held more than I was expecting.The description lists the weight of the smallest unit as either 66 or 39 lbs, the medium 52 or 43 lbs, and the big one 111 or 65 lbs, depending on where you look. Since this is something you would want to know if you broke your back before in a traffic accident, I posted a question about which one is correct, but received no reply. Anyway, at least I can now answer the question myself for the medium size. FedEx lists the weight to 4 significant digits as 31.85 lbs on the shipping form. However, if I stand on my personal scale while holding the box and subtract my own weight, I find 43.4 lbs including the cardboard box. So at least here, the lower number, as given in the product details, seems to be right. And FedEx did get it right that there was a 3 in the number.
LeoninT 
