People who think flying NDB approaches are difficult are the same people who only flew them during the training environment, where you would do one after another after another after another. There is a set procedure to do them, ie a course reversal, arc, vectors, whatever, but if your only shooting one to get into an airport, and then leaving off to somewhere else, they aren't bad. Inaccurate, somewhat, but I agree with squeeze, if that's all you got, hey good luck with that, if you have other stuff to assist you, they are just like every other approach, you practice them to proficiency.