Essentially, this is a compilation of over 20 different trance/house/acid songs from good, but little known, smaller label bands, mixed so it's seamless (ie, there's no break between songs).
Most of the songs are very very good - some are extremely good (Come with Me by Qatarra, The Calling by Solar Stone, At the Edge of Time by SUN Project), with only 1 being bad (and that's near the very end)
All of the songs are short - the longest being 4 minutes, but there are so many, the cd is filled almost completely.
Anyway, if you like this sort of music, this is a great cd. You get well over an hour of great music. Also probably good for parties, as it's at an almost constant 140 bpm.