most of them are from people who didnt pass the ppl
Rubbish - close to 100% of people pass their PPL at OBA first time.
It is internally examined. I know someone who was at OBA for 3 months - who saw just one person not pass the PPL.
So you are talking rubbish. In most cases people who comment on here did pass - they were just unhappy about the school, setup, owner, dodgy cancellation fees, surcharges, none optional optional extras. The list goes on! And that's just from searching for OBA on here!
Granted - most of the posts get removed - as the owner threatens to sue Pprune. Say's it all - the truth is out there - and it hurts!