The Four Points at JKIA is also good for an overnight although there are hard-biting midges in the courtyard. And I agree that 2 hours or so prior is fine (although you do sometimes need sharp elbows to maintain your place in line).

As an airline, I like KQ and fly them plenty as I have some interests in various safari operations in that part of the world

Seat is fine for sleeping, crews always delightful and J prices tend to be very good (certainly ex AMS). They also have a good regional network ex NBO and the Pride lounges are nice.

Only caveat for me is that I have had some dreadful food onboard (although never food poisoning dreadful thankfully). But I’d save the money vis an vis BA and spend it on the ground.

Enjoy the trip ScruttonStreet