We were in Changi Airport for 7 hours in transit before flying out to Frankfurt at 23-55. Booked a 6 hour stay & it worked very well. Speedy checkin ( had booked online in advance) offered a wake up call. Simple hotel room ensuite,tv, tea/coffee,kettle. Was able to leave hand luggage secure & look around the Huge airport. We showered & changed before catching our onward flight feeling refreshed.