Well, I've received my F5's. A few things:
- they were sent to Canada c/o USA so I was charged $20 duty. VERY disappointed in this. Fiio, please take care of this issue for all customers that can be affected in the future
- the connectors on both sets of cables, the IEM's are EXCELLENT and very snug. So that is fantastic. I don't foresee there being any issues whatsoever.
- all the glowing reviews about the sound are very accurate. Soundstage is excellent, tuning is very well done. They're warm yet balanced to my ears. Maybe a slight v-shape. Slight roll off of the treble, but musical. Really nice job. Decent circular soundstage for the price - that seems rare. Ovular is more common at this price point, in my experience. Well built as well.
I'm happy with them overall, and the dual cables (balanced cable as well!) and great case as well as the IEM's themselves make for an excellent cost effective package.