My penny’s worth. I spent the last few years flying in J2. I was also a trainer and after retirement a sim instructor / examiner. I could not be more positive about J2, a great airline with great people and crews. There are ex military pilots but not overwhelmingly so and more importantly they were all very good guys and gals that I encountered. The company is down to earth and pragmatic in line with its oop North roots. The terms and conditions have increasingly improved to be at the higher end of the industry. I can’t compare J2 with BA although I have many friends in the latter. It is of course a personal decision but unlikely to go badly wrong in my very humble opinion.