I worked there for a few years. I have to say that ive worked in many schools and I always tell people that mesores avos was one of my favorite schools to work in.
The Hanhala was very cordial and respectful and so was my experience with most of the staff there. I believe the parent body is a nice mix of chasidish. From my perspective I saw all different types (although all chasidish) but wouldn’t consider most of the parent body “fancy”. Overall felt like it was a nice mix of very frum chasidish families.
I know I didn’t exactly answer your question and I’m not sure how it compares to Darchei Avoseinu but still wanted to chime in and share my positive experience working with them.