I have had the Viking for about 18 months. Stellar performer.
Connected to the Holo May KTE via BNC. The display on the DAC mirrors that of the CD Transport. Sonically, deep, black soundstage when playing Herbert von Karajan Deutsche Grammofon discs, for example.
However, I also have the Magnetar UDP900, which is a beast. I am listing the Hegel Viking for sale, but I live in the UAE!
Aside from wanting to reduce number of units - no complaints here!
Not a device you will regret owning.