Has used the 3.5 mm Chu II as a first IEM for almost six months with an Audiocular D07 dongle, and finds it crisp, clear and far better than their old headphones, small and comfortable for long sessions. Notes the 3.5 mm version has no mic, the dongle made a clear difference, and recommends memory-foam tips over the stock ones.
“Another thing is that the Moondrop Chu II are small and quite comfortable in my eyes, and I can wear them for long periods of time without headaches or dizziness.”