Originally Posted by
dsgtc0408
... BTW there's more than one transit hotel - I believe there's one in each of terminals 1 and 2, not sure about 3. However whether they are related to each other, etc I don't know...
They are. There's one booking Web site for all three (yes, T3 has one too). They assign you, space permitting, to the one in the terminal you'll depart from. (That's one reason they ask for flight info.) If necessary, they'll put you in another one. If "the transit hotel" is full, all three are.