I bought this on the spur of the moment, as my daughter wanted one of the tracks played at her birthday party.
The problem I have with it, is that the continuous mixes are nothing more than a simple overlap of the end/start of each track, and in most cases, not particularly well done. You'd get a similar result by chucking a few tracks into Windows Media Player (or iTunes etc), turning on crossfade, and then recording the result.
The other problem I have with it, is that the individual tracks appear to have been directly ripped from the mixed cd's, and subsequently have overlapped songs at their start and end.
If I'd bought this as a CD, I'd send it back!!!