Not sure, but I found some reviews of it online:
http://sewing.patternreview.com/review/machine/4596 (create a free account to login and read the entire review)
There may be others at that site too.
In any case, are you sure you could exchange it for something else? Many dealerships do not allow returns, but usually will let you "trade up" a machine just purchased. From everything I have read online, Babylock has the best reputation for sergers.
One thing I am not sure of is the "coverlock" designation. This may mean it does only a certain type of stitch, used mostly for serging seams in clothing and hemming knits (such as the bottom of a t-shirt). A regular type of serger will do a larger variety of stitches, including rolled hem and decorative stitches. The ideal is to have both types of serger. Anyway, I found this thread which may provide a little more info:
http://sewing.patternreview.com/cgi-...l?f=43&t=48451