RPGVault has provided us with a very brief preview of ShadowGuard, one of the Neverwinter Nights modules that will be available for purchase from BioWare's online store. Here are some of the reservations they have:
The module is quite short; it's rated at two to three hours, although it can take somewhat longer if you explore every possible corner and conversation. The strength of the narrative element is primarily achieved through having a fair amount of text to read. As a result, the ratio of action and the overall pace may not be to everyone's liking, although the latter definitely does pick up in the later portion. The ending sets the stage for a continuation, so it isn't final and may not feel completely satisfying.