This drop box is a good size. All of my packages have fit so far. The lid comes off easily enough, but fits securely and wont come off by itself. I would consider the container to be a medium duty plastic, but relative to its size, it is lightweight. I was worried about the strong winds we have, so I put a heavy rock in the bottom just to keep it from moving around. There is an air vent thing on the back, I'm assuming to allow for changes in temperature. From a distance this looks pretty good, but up close, you can tell its inexpensive plastic. I'd compare it to a child's pretend kitchen set. It is definitely better than the trash can I was using for packages before, and much more affordable than other parcel lockers I've seen. Overall, I would recommend.