That's pretty much my experience when I did a MAN-DOH-DXB return using Avios last year.

Service and food was great. The F lounge wasn't open then, but the J lounge was great, and pretty empty the time I was there.

The only issue I have is you never know what sort of plane you'll be on! From MAN, it could be a A330/B777/B787, and they change at the last minute.

On my DOH-DXB leg, it was supposed to be a B787, but got change at the last minute to an A320!