While I can't say I've tried anywhere near the F cabins, I will say hands down, I have had the most fun on long haul Emirates flights, and I've flown them in first and economy on varying trips and they win in both cabins.

They hire the best flight attendants I've ever seen. Their F class FAs seem to abe to magically balance being friendly and bubbly, without being overbearing, and a remarkable sense of anticipating your next need/desire and are proactive to deliver it, without you having to ask. My DFW-DXB flight last year, I had an amazing Australian woman in my part of the F cabin and she made the trip ^ Hard product is what it is, but you pair that with grade A service? ^^^^