We had bought the plug for the China trip. He took care of Beijing, about Qufu, Tai'an, Qingdao to Tianjin (Northeast China) about all inside. Yes, he's quite a chunk, if you can turn all the adapters on that cube. But precisely what is a cloth bag in with, you can disconnect any adapters unneeded and stowed it.
The "Cube" works quite well processed, the adapter plates sit bombproof (without pen or similar stable articles I got the not from) stuck well and everything can.