AFE for me, without a doubt. I bought it when they first produced the spiral bound edition, which is just brilliant - open it to the page you need, then it'll lie nice and flat either on the seat beside you (solo) or on your kneeboard. Content is usually pretty up to the mark, in my experience, but every guide by their very nature will be out-of-date even as they are published.
They are as advertised, just guides. I ALWAYS ring airfields I intend to visit just before departure to confirm procedures, frequencies etc. I heard of someone recently who relied on a guide for the airfield frequency, which had changed. Very embarrassing and potentially quite dangerous!
Cheers,
TheOddOne