I used an old Behringer Xenyx1204USB as my travel karaoke mixer for many years. It isn't reliable anymore. I get occasional noise problems and some of the buttons now stick. It is not worth my time to fix it. I have been looking at something smaller and more robust. There are a few options but the best two seem to be the Peavey Unity Digital 8 @ $500. I played with one at NAMM this past Jan but as of late, only one or two sites show it available, and you cannot download a manual yet. The other option is the Behringer Flow 8 @ $200. The Behringer is definitely more fleshed out and the online reviews seem positive. The phone app seems robust enough although I saw some minor usability issues in some of the videos. Has anyone tried one of these?

