I'm making that transfer right now on my way to SIN. I did have to rescreen security and remove my laptop. Even with that, from leaving my flight to entering the AC was no more than 15 minutes. The signage leading to the AC is not the clearest, but with minimal effort you can find it. Coming into the Departure area, hang a left and go till you see the Excelsior coffee shop, then look to the right for the next sign. Great club, much bigger than the previous AC, plenty of computers, free wifi, five shower rooms, comfortable chairs, two beer machines, etc.. They have this circular arrangement of 5 highback chairs that look really comfortable, though it makes the most sense for a group as it almost requires interaction.

My JAL flight to SIN leaves out of the smaller satellite terminal - the receptionist at the AC advises 10 mins to get there, including the shuttle, so that means I need to start packing up.