It took hours to assemble it. Manuals are NOT easy to follow.
IF you don't have an electric screw driver, don't dare to try!
Also, one of the part didn't have nail holes to assemble. I tried digging it with my electric screw driver but no chance. 
The power adapter is not compatible with 110V.
I asked the seller to send me the parts, but it said it would be delivered in December.
I already assembled almost of it, and I would not wait until then. I AM RETURNING THIS!