This is simply some of the most amazing acappella singing I have ever had the pleasure of finding.  Prior to buying this CD, two of my very favorite Christmas CDs were, (and still are), both volumes of "An Evening in December", by contemporary Christian vocal group, First Call.  If you've ever heard those albums, you're very aware of how lush,full-sounding, and "goose-bump-producing" good acappella is supposed to be.  Well, "Nog" fully delivers all that and more on this phenomenal recording, (and that's really saying something when comparing to the First Call albums); this is the kind of arranging that is so good, you completely forget that there are no instruments backing up the voices.  The vocal parts weave in and out of difficult chord progressions and odd resolutions in arrangements that are constantly surprising and fresh.  All 10 tracks need to be listened to very carefully, as there is a LOT going on in each one.  I would be hard-pressed to select any tracks as the "best" ones of this collection, but "Little Drummer Boy" is particularly powerful, and the pseudo-doo-wop treatment on "Rudolph" is great fun, while "Silent Night" is absolutely gorgeous.  The singular downfall of the CD, (and it's a very small one), is the somewhat silly spoken intro on "Let It Snow".  It's fun the first time through, but starts to get old on repeated listenings.  In short, this is an absolute must-have for acappella and vocal group enthusiasts, and for Christmas music lovers in general.  It's a shame that it's not on a major label.  It deserves to be heard in the mainstream.