Haha no problem at all. But to be on the safe side, do email
them a few days before to check if the room you want is available.
I have friends (in Japan) who did an online reservation only to
find there are no available rooms when they arrived. Print out the
online receipt/acknowledgement slip.
Or you can PM me and I can help you check (haha now in
Bangkok).
Regards,
BKKboy