Great Entertainment - Lots of Plot Holes
Kidnapped is one of the more entertaining and interesting shows I have watched in recent memory...as long as you can get past some very obvious plot holes and "Why didn't they just do (fill in the blank?" scenarios.
They come early and often making the show somewhat annoying at points, but in general Kidnapped is superbly acted and very suspenseful. If you are one of those viewers who cannot forgive shows/movies for having obvious weaknesses in plot then don't watch this show because you won't be able to let the slights go by and enjoy it.
Besides these writing issues, the dialogue and character development is great. Delroy Lindo is awesome, although I have always enjoyed his parts so I may be a little biased in that assessment.
Bottom line is the pros outweigh the cons. If you are looking for a "mini-series" (I put that in quotes because it was not intended to be one season,) to get into, try Kidnapped.