As for etihad, I have superb experiences over 5 years in all the cabins.
The business cabin is private, well laid out, spacious, their aircraft much newer compared to BA, quieter, and a more modern design, contemporary cabin and overall experience. The a346 is comfortable and luxurious in layout, and a pleasant and quiet aircraft, full of the latest technology for flight, as well as cabin experience, entertainment excellent.
Premium travellers have superb lounges, and exclusive facilities in AUH.
I have travelled with them since they first started up, and they just get better. Lhr to AUH, syd, bkk in all classes.
You also get a chauffeur car each end.
They leave BA and other airlines well behind in quality and service, in every respect, as most Emirate airlines do,
Try them, and you will see why they are successfully taking business of many other airlines. They are simply better, and offers fares that are less at the same time!
Food on board is superb, with anytime menus to order when you wish.