As someone who has earned 80%+ of my 2,500+ BAEC TPs flying QR (even when there is a BA alternative) over the past 12 months it's nice to see the QR love-in on this thread.

Two comments:

The A319 overnight flight (for which you should dine pre-flight in the lounge to maximise in-flight sleep) is great if you are travelling as a couple; if travelling by yourself there can be aisle access issues if the seat/bed next to you is occupied by a total stranger.

If your DOH layovers start exceeding 5-6 hours do consider investing in a room at the airside transit hotel.