Keser may not use microscopes but he's known for excellent hairlines. He's a former HLC doctor (as is Pekiner) so he has a solid pedigree. He does not do large cases, 700 grafts per day max. I would have been a 4-day procedure! Yikes! He doesn't speak English but he has translators... and honestly once the procedure begins, there's not much talking He was my FIRST choice and I booked an appointment with him in March, but he cancelled on my because of family issues. I was unable to reschedule due to COVID. Before writing off Keser, do your research on some other forums. His hairlines were/are my favorite.
That said, all the clinics you're considering are excellent. They are doctor-led procedures and have excellent track records. Of the names you listed, I would go with Bisanga.