I purchased the Navigator from Musicteck after Chang from Nightjar recommended it in advance of CanJam NYC 24. I have experience with USB DAC/Amp dongles from Cayin, Lotoo, and L & P and have owned a number of DAPs from Sony, Cayin, and iBasso. I record and produce music and have a healthy curiosity for HIFI gear so acquiring a Navigator was an easy choice.
After a week with it connected to my MBP, running Audirvana and driving the the SIngularity and Mezzo LE IEMs, I expect to keep it around for a while. Aesthetically it is a simple, sturdy device with a cool look. There is no display. There is no way to know where you are at with respect to volume throw and no indicator to display the current sample rate. What you get (and pay for) is a rather large audio presentation with weight, strong lower frequency presence, and smooth treble reproduction. It resolves nicely and the stage is wide enough, but this is not a device for analytical listening. The Navigator is tuned to sound big and fun and it appears to have power in reserve to drive most IEMs without compromise. It is well matched to most of my music collection, benefitting rock music from the 70's and 80's. It might not be my first choice for techno or electronic dub if using a warm of neutral tuned IEM, but I don't mind a slightly dark and heavy presentation and that's what I got pairing the Singularity with Navigator... and I found myself listening for hours.
An easy recommendation and one of the most enjoyable sounding USB DAC/Amp dongles I have owned yet.