Seems like a good alternative to a Duo, especially if you already have a TG-16 or PCE but no CD system. It's also nice to get away from discs, lasers, pots, gears, and the problems associated with them.
Having said that, I'm not gonna buy one because I already have a Duo. However, this will extend the lifespan of the PCE CD, and that's always a good thing.