Very heavy and sturdy, so make sure you assemble it where you intend to place it!
Assembly took more than 2 hours, WITH power tools. The assembled product is, again, heavy and sturdy. I like the fact that they use metallic locks, unlike Ikea which switched to plastic!
The top piece is thick and heavy duty, I placed a 50" inch TV mounted on a heavy universal TV mount,
Keep an extra bottle of glue (I use Gorilla) around, because the one that's provided isn't enough! I usually squeeze a drop or two between the wooden pieces for extra rigidity, I always do this with all furniture, not really needed but why not :)