Game is fun but co-op...

Co-op actually is even more fun but, damn thing is unstable. People DC, I see netdriver errors popping up, no steam login etc etc. Too many problems with it.

I believe they are using epic infrastructure for co-op, but I am not sure why is it so bad.

There are runs that I can finish 20 lvls without anyone DC'ing but that is an anomaly.

I play on PC/Steam.

What's your experience?