I love Deutsch Gym for its flexible schedule, reasonable price and the opportunity to meet new people. Personally, I prefer the older version (audio only), primarily because it enables me to decide at the last minute whether or not to take part in the class on a given day. Downsides: it's a bit late-ish in the evening for me (I usually start my working day around 8-9 am), but I understand this is practicable for most people with full-time jobs. Another crucial thing: while everyone at the C1 level is lovely, I feel that not all people speak German at the appropriate level. In particular, pronunciation seems to be a challenge for some and that makes them difficult to understand (and hence challenging speaking partners). Perhaps it would be a good idea to establish another Deutsch Gym group, focused on pronunciation. Just an idea. Glad I could share my thoughts.