I always go for the spiral bound AFE purely because it will fold round and flat, pooleys won't.
And on the subject of ammendments and accuracy I would recommend always ckecking such guides against the AIr Pilot. The last edition of the AFE had some quite serious errors in my area, most notably the bases of some controlled airspace were mixed up...potentially extremely emabarrassing. That said the Air Pilot has had the East Midlands missed approach incorrectly printed for donkey's years so who knows!!!!