I have it and it's one of the better jam packs, IMHO. There are some great drum loops of different flavors. For me, the symphony orchestra and the world music jam packs are the best of what's available (though I have them all nonetheless, through having purchases Logic). I was also frustrated by the lack of solo instruments in the symphony orchestra but I also have Finale and that has a large segment of the Garritan Symphonic Orchestra in it so I got the solo instruments that way. Also, check out 'free virtual instruments' online (doing a google search). You'd be amazed what's available. Last, but not least, do you have all of the free loops which are available through iComp in the members only area? Some of those are AWESOME.

I have it and use it quite religiously. I have all the jam packs and recommend them all. The one thing I find limiting is the number of instruments (loops are great). If you don't already know about it, check out platinumloops.com and loopmasters.com they give away great free stuff but if you want to put up the twenty or thirty dollars you get some really nice loops that I've yet to hear on icomp.