Last year I flew from Brisbane to Norway for a simulator trip. Went Bris-Sing-Frank with Qaintass. Eurowing to Stavanger. On the way home I went via Heathrow T4 as I was code share with BA. As a gold card with OneWorld I went to the T4 lounge. CRAP ! It was a awful, like something from a communist state in the 70's, tatty carpet, no food or drinks and nothing to watch read. There was only 4 of us in there. To be far to BA, I did get an upgrade to Biss for the leg to Singapore, great flight, great service on board far better than Qaintass.
I am flying to Scotland in Dec with the kids with BA rather than Qaintass for most of the legs because I prefer BA longhaul.