Excellent early & rare IS: buy it elsewhere
The Craft recording is of the original ballet score, done under the supervision of IS for Columbia. It is, as bklynd says, taut and hard-driving, and a good complement to later versions and recordings. This is the only currently available recording of the complete Rossignol, the Erato being out of print. It's excellent early IS, I recommend listening to it while reading the Hans Anderson story, as it follows the plot quite closely. As to cost: eMusici will note with the new cost of $0.49, the break-even point for a standard Naxos $6.99 MP3 download is 14 tracks, at eg ClassicsOnline. Don't blame eMusic for the licensing arrangement, and thank Bach the per-track structure makes many Naxos [andother] albums a steal.