Still enjoying my ET3. In combination with an SMSL DO300EX DAC it's as good a digital front end that I've owned. That includes a Saturn-R.
Currently using the USB output but will try the I2S at some point.
Good points? Looks & feels like a quality product. Reads discs quicker than any newer CDP I've owned (but still not as quick as my Rotel RCD-965BX). Display is small but still perfectly legible in bright weather.
Bad points? Cheap plastic remote is a let down. No direct track access on the remote is occasionally annoying as well. Not sure if you have direct track access using the app rather than the remote, I haven't managed to connect the unit to my WiFi. In fairness I only tried briefly to connect it when I first got it, I have my WiiM Pro for streaming duties.
Would I recommend one? Yes, absolutely. If you want an excellent sounding, well built, compact CD transport then I don't think it has much competition at its price point.
TS