We've been using the bed frame for more than a month and it is very good. Assembly took about 3-4 hours. My wife and I assembled it. We just used manual screw drivers and a small hammer.
The bed frame is very strong and stable. Very good price for such a good bed. We bought a semi-double bed. Considering the size of Japanese houses, this was a wise decision. We are able to sleep comfortably and still the bed doesn't take up too much space in the room.
Delivery was on time.