Man I just love being able to clearly see the sampling rate in all its big, white, segmented glory from my listening position. It's also so nice being able to confirm the input and output at a glance too. I never understood the "black box" design choices where you get no visual feedback and just trust it.
I tried it at both 4v and 5v, and I much preferred the way preamp volume functioned at lower levels at 4v.
Also IJWTS that my unit came wrapped really well for shipment from CN. And Topping's packaging makes for a great unboxing experience - it does not feel "cheap" in my experience. Well designed double-box, with accessories were appropriately packed and stored. Glossy surfaces were protected with plastic sheeting. All protruding connectors (RCA, BT, etc) had vinyl caps on them. Silica gel packet. Every detail seemed thoughtfully executed.
Also I can't really say whether it sounds better than my DACMagic 200M. It's dark and quiet like I like it, though.