First & last

Route: Johannesburg to Addis Abbaba and Addis to Bangkok
Check-in: In Johannesburg - farcical and slow. Slow system. The same in Bangkok. In Addis there is no structure, no queues.
Planes: they brag about their new fleet, but the plane from JHB to Addis may have been newish, but the floors were dirty, the trays had old food on them, the individual TV screens scratched, the sound appalling. The flight from Addis to Bangkok (and back) was on the oldest plane I have flown in. No individual screens and some of the instructions were still in German.
Hub: Bole International Airport in Addis is no hub. It is a glorified shed. Three restrooms serve it, there are not enough seats, there are no lounges.
Service: characterless staff, some rude, some with exaggerated American accents, unhelpful and unprofessional (in Addis, when we taxied, people already got up ... no control from the staff)
Verdict: it gives Star Alliance a bad name. I will never fly them again.