Transit in Singapore

Using the free internet in Changi airport. Left Athens about 12 hours ago & had a good flight. My plan t0 book us into a window & aisle seat worked this time, with no one in the middle seat. However, the next leg looks as if it's pretty full so maybe we won't be so lucky. We were going to check out the free City tour, but apparently it could take longer than 2 hours by the time we get back to this terminal where the airport hotel is. If we don't turn up on time we're likely to lose our room, so we've decided to stay put. Plenty of stuff to do here in the meantime, & comfy seats as well. The holiday is over - too bad!