Although there were not that many manufactured you will probably find quite a few people in the UK who fly commercially have flown one. I believe Cabair had a fleet of them at one time used for commercial training as did Leeds Flying School where I was first introduced to the GA7. At the time having little twin time I found it to be a good for the role (CPL/IR training) but as suggested for real world ops a tired example would be lucky to climb SE! No surprise here but I understand that getiing spares is not too easy.