I owned Xernarc, lilliput 618 model and now 619 model.
First compare xernarc to lilliput 618 , it is dull. Lilliput is brighter which I like. I heard people complaint that it is too bright, I don't know why they complaint about it when you can lower the brightness. Compare the picture quality, still lilliput 618 won. For problemless, xernarc won. Problem like loose wire or cable inside the lilliput is common but no big deal if you fix it.

I bought the 619 model which I was told less problem with the 618. For some reason, the picture is abit better then my old 618, maybe I use it for sometime now then backlight getting old. so far no problem with 619 model, converting to indash soon.