A big thanks to Carl & Martina from me as well. It was a well organized tour and we have seen quite a bit. It was my first trip to Auschwitz and I have learned a lot. Carl's extensive knowledge on the subject really makes it a Study Tour. Like hucks mentioned we have seen a few things that the normal tours do not address, a very interesting bonus.
Thanks go out to you as well hucks, it was a pleasure meeting you.
I to can highly recommend Carl and I look forward to a future study tour.