In the beginning, they were not sure I had booked and ask me to figure out by myself even I have already printed the document and show them. Ather many minutes, the other guy checked again and again then told me that was ok and let me check in. Thanks for the kind guy!
I recommend you must print the proof of booking (and show already paid or not) and bring it when you arrive there.
The wifi of single room is not strong enough. But it is very clean and cozy.