Escort through security if checking in at BKK. Transit involves buggy from plane to FCL, hour massage, private living room, buggy back to plane. And then a buggy at certain outstations!
We didn't get a buggy. Someone was waiting as we deplaned in BKK and he escorted us through security and took us to the lounge. The living room was great, the massage was excellent, and it was all very personal. When it was time to board an agent walked us to the plane again, and pushed us through the whole line of passengers. I felt like a king right then.
I had a 3.5 hour connection and I thought the entire experience was very smooth.
On our way to CNX, we were sitting in The Pier and we nearly missed our connection because I lost track of time (was trying to switch to the A350 flight). So while we were sitting in BKK, my wife got nervous when it was 25 minutes until takeoff and we were still sitting in there. It was very cool to be able to reassure her that we didn't need to worry about anything except enjoying ourselves.
However, I feel like if it was a longer connection I would prefer the FCT. Maybe it's because my FCT visit was followed by an excellent flight and that changed my perception of the whole experience.