Lots of flexibility!
I've enjoyed my experience as a student with Silk Mandarin. They offer a lot of different course types, so there is a lot of choice depending on your learning style. Whether you prefer online, in-person, group classes, or private lessons. I really enjoyed the HSK 2 eight week intensive - it really propelled my learning. I'm now taking private lessons and they've been really flexible, which I appreciate as my schedule is so irregular!